Hoshi

Hello, This is becoming a bit of a murky conversation. This often happens, collectors operate at different segments, value different things, and operate under different constrains, financial or otherwise. Everyone likes a collection that tells a story. It’s a human thing, we are storyteller’s. I think this is the most important, there should be an engaging Gestalt emerging over time. And It’s as much a story about oneself and the story about the object themselves. Back to segments. I don’t think its right to say one should save X before buying etc. I think it’s very reasonable to begin with a humble blade that is at the entry level. Just to feel if you enjoy being a custodian. There is an emotional experience to be had there, and I think ownership is important. Does that mean we should keep doing that? I don’t think so either. There is a much richer personal journey ahead, a kind of quote-unquote Cursus Honorum or honorable passion track where you visit new heights year after year. What matters is the speed at which one learns. And there is an internal component to this, learning what one likes, because preferences change, especially at the beginning where it evolves fast after this first blade. The good news is that it stabilizes also after some time. One day, you find « your thing » and this can be like Jussi’s enamored state with large war swords from turbulent period of history. It can be General Gendaito with special issued blades and family Kamon. Tastes are also shaped by constrains, why would you allow your brain to form attachment to things that are forever out of reach? If you want to collect only Osafune Mitsutada - and there is someone famous who did just that in modern times, emulating Oda Nobunaga - it makes no sense if you can’t reasonably afford it after a few years. It’s not even worth day-dreaming about it. Attachment is the cause of suffering as they say. Our preferences are shaped in part by our economic opportunities, and this is psychologically healthy. But it’s also important not to let your attachment to a particular segment make you lose sight of reality. That’s cognitive dissonance. It’s an illusion, and it’ll harm you on the path of learning, a great deal. « Quality is relative » « Muromachi Sukesada can be just as high quality as top Bizen » « I’ve seen really good Muromachi Mino that are better than top level Soshu » You can be Sukesada collector. There is merit in that. It can tell a great story, but don’t be under any illusion with regards to its standing within the epic historical arc of Nihonto. This is why I like Jussi’s approach. He’s humble, he recognizes that what he’s after is unorthodox and not quality dependent, he’s cognizant of his emotional response, and he longs for the fearsome Odachi and O-Nagamaki clashing during the height of the Sengoku Jidai. The more rustic from overlooked provinces, the better. Back to learning. If you can reasonably do it financially, it’s worth going up the Cursus Honorum. Take progressively bigger risks, see how that works out. Try to identify a good Koto Tokuho sword, and try your luck at passing a blade to Juyo. if you succeed you’ll have absorbed all the losses you might have taken when reselling the the 2-3 smaller pieces that did not make it, and when faced with failure you might learn something important. After that, you should sell some swords, because going through the pain of selling is healthy and important. With that first Juyo firmly in hand, you have contributed to the field is your own small but significantly way, making this sword and its scholarly commentary published for all adepts of the Cursus Honorum who diligently purchase the Zufu volumes and track passes over the years. The mysterious travelers of the Cursus Honorum will notice, and soon you might find yourself part of that community that often visits Japan around the time of the DTI. Provided you're a good human, you’ll be invited to private events that will open your eyes wide in awe, hold onto your hands some of the most significant masterworks ever produced, and find that connection to the sublime. And once you experience it you will remember it forever, and you will be lastingly changed. This was the path Darcy threaded and relentlessly tried to teach to those that would listen. A path traveled by legends such as Paul Davidson, Walter Compton, and many others, still living, whose names are to be discovered along the path. And on that path there are a lot of opportunities for progression. Learn with Tanobe-sensei, discover lost provenance, pass items to Tokuju, and much more. You will learn to navigate another culture and to deeply respect it, and this is perhaps one of most enriching aspects. At the highest levels, the peak of the peak, you will encounter a rarified few that operate at the level of these Ethereal Meito. There, it’s decades of relationship building to create the bonds of trust, deep respect, and commitment required. Even if you have the financial means - which is a rarity in itself - earning the access is an extraordinary feat. At this level, it’s not about “recouping your money” anymore. These blades are priceless treasures and the demand is there no matter what. It will appreciate just as blue chip art. You are safe, there will always be a buyer. The top 10% of Tokuju are such culturally significant masterworks that they hedge themselves from economic downturns. But at this level paradoxically money becomes less important, and choosing who the next custodian will be becomes a primary concern. It’s a responsibility, money comes and go, but such historical treasures call for the most capable and worthy guardians. It is like choosing an heir to the empire. That’s the peak. By the time you reach it, you'll be old. And you might die pretty soon. The Chairman and majority shareholder of Token Corp passed away last month at 77 years old, and he left us a beautiful museum in Nagoya that will educate generations to come. What a legend. RIP, Kouda-sama. Your legacy will endure. To sum up, yes - measure your risk, buy small at first. Play in a field where you can play by virtue of your prospective economic condition. Nothing wrong with that at all, but do not succumb to delusions and cognitive dissonance. You’ll induce yourself and others in error. If you have the financial means, don't get suck accumulating one hundred medium/low grade swords. Seek progression up the ladder of both quality and knowledge, which go hand in hand inevitably. Don’t peddle green papers. Don’t hurt others. Do no harm. Don't be evil. Learn what you like and chart your path. That's the most important. The Cursus Honorum is optional. But it sure is a beautiful journey. best, Hoshi

Hi, "Based in Japan" - very unlikely. You are probably dealing here with an associate of the infamous '100M $ tachi' swindler which you can look up on this board. No Japanese dealer in his right mind would put such a banner as visual identity for a sword shop. Even if you got it at the auction hammer price, trust me - you dodged a bullet. Avoid Ebay, avoid YJP. You will get burned. Your best bet to find a decent entry level sword is to buy from a reputable dealer on this board. Best, Hoshi

Hi Carlo, This is confusing I know. Back in the days, when I drew my first Oshigata, I drew the hadori outline of the sword... From this angle, what you see being at the yellow line is the outline of the hadori, the whitening finish that the polisher applies on a traditional kesho polish. What you see in red is the boundary of the true hamon. This is a rather intense hadori job that has been done quickly, and the hadori line doesn't follow the hamon accurately. It is emphasized here to create an undulating impression (the default for hadori, which is created by small circular motions of the thumb following the hamon with a piece of shaped whetstone underneath), whereas the hamon of your sword is composed of angular gunome with deposits of nie. It's a common occurrence to find rather quick and intense hadori works for swords where it is financially irrational to invest thousands of dollars (3K-4K$) and wait for a year to have an appropriate, character elevating hadori finish. This is why western collectors drum sashikomi as the only right finish, with hadori often painted as being untruthful 'make-up' to mask things. Top tier hadori is wonderful however, and appropriate for many types of nie-dominant blades interpreted in a shape that the finger can realistically follow. When looking at the sword under an angle at the light, the hadori will visually vanish (Going from light to dark) and you will see the light reflecting at the nie (Going from dark to light), forming the real border (nioiguchi) of your sword's hamon. Hope this helps, Best, Hoshi

This is a truly wonderful sword. Having seen it in hand I can attest to its qualities. Before seeing this sword, I associated Ko-Hoki strongly with the dark, and rather coarse, standing out hada, and while it has its own archaic and wabi beauty, at the top of Ko-Hoki, we find a more refined hada, both finer and richer in dark ji-nie. We can see how these high-quality Hoki blades inspired the much later Soshu revolution, where artists such as Norishige strove to reinterpret these works in his own unique way. Yasutsuna blades are unicorns, with only 22 Juyo designated Yasutsuna, 6 Jubi, and 5 Jubun, and one Kokuho. Seeing one on this board that has been so expertly photographed, filmed, and documented is a great blessing. Thank you Brano. Best, Hoshi

Hi, Saving thoughtfully for a sword isn't taboo; rather, the true taboo lies in the opposite practice—impulsively accumulating a hoard of stuff because one likes Nihonto. That same collector, ten years down the line, could have been the owner of few but immeasurably valuable masterpiece. I have the firm conviction that collecting skews highly towards rewarding delay of gratification, and I like to think of it as a form of rebellion against the tiktokification of our brains. Our communities shape our identities. In our current timeline, we ought to strongly prefer associating with people who desire and take active steps towards preserving a functional attention span, the capacity to delay gratification, the motivation to carry on diligent study and the savviness to build high-quality social bonds along the way. My desire to help and share knowledge in turn depends whether or not I sense this potential in a curious soul. At the end of the day, we become who we hang around with. So we either police our spaces and create strong cultural norms, abandon the space, or risk becoming something we don't want. Ted Tenold, a wiseman from Montana, once told me that this hobby is like "growing a bonzai garden" - and it stuck with me. Take it slow, prune the leaves carefully, let it grow over decades with intentionality. The meaningful pleasures of life are in the waiting, not in the act of consumption. It is not uncommon for collectors to save for a year, followed by one or two more years between parting with their money and taking delivery. It adds up quickly, six months for a new habaki, one year for a great polish, one year between passing Juyo Shinsa and seeing it for the first time. Three years between the formation of an intention and seeing the results of this intention materialized. These timeframes sound insane to most people, especially when you have Amazon same day delivery and the customer entitlement that comes with it. But I think it carries benefits for character building. There is contentment to be found in doing things slowly, the right way, without cutting corners, as oppose to riding the dopamine-fueled pleasure treadmill to get the next hit. This all sounds good in theory, but this level of patience is hard fought for, especially not nowadays in our neurologically damaging environment, and even then, we all have moments when we're the proverbial five year old in the candy store. It is really hard. It takes a lot of time and intention. Perhaps, we are all bonzai gardens. Best, Hoshi

Dear Denise, Yes, they are both Kamakura smiths. There is no explicit information on either the Sayagaki or the Setsumei that tilts towards one or the other. Now, let me explain something more important: I would not fret too much over Nidai or Shodai - as in, who made it, in the end. The scientific reason is that we cannot know, we do not have a time machine. We do not even know if NOR238 was really a different person from NOR237. Their period of activity is close, and the old paradigm of attributing stylistic and mei changes to subsequent generation is slowly being replaced a paradigm more consistent with Occam's razor: smith simply changes their styles and mei over time, especially those that have long period of activity and have intermediary pieces in terms of deki that allow for a continuity in interpretation to emerge from their corpus. This could very well be revised in the future. In your specific case, it would make no difference from a market perspective to me, having a blade signed in the NOR237 or NOR238 mei style, given an equally compelling deki. Both smiths are Tokuju capable, both smiths have Juyo Bunkazai blades with similar degrees of preservation in terms of mei. In terms of rarity, blades by NOR238 are even rarer than those by NOR237. And last but not least, to me at least, they are likely to be one and the same smith. I would be 100% focused on the deki when assessing the value of the object. Specifically, where it stands within the corpus of NOR237/NOR238, within the broader Yamato tradition, and in relation to other school founders. Best, Hoshi

And here is the key sentence: Notably, there are places where the gunome form continuous groupings, a typical feature of Norinaga’s work within the Shikkake school. The important praise is this: The bright nioiguchi and soft temper line. Bright and soft nioiguchi is rare in Yamato work, and indicative of top tier (i.e Juyo worthy) work for Yamato. As I explained previously, the NBHTK does not make a call on Norinaga I or Norinaga II. It simply states that this is Kamakura period tachi attributed to Norinaga, which can mean either Norinaga I or Norinaga II.

Hello Denis, We need the Juyo setsumei of your sword to go further. As a rule: NBHTK only attributes to the second generation (Shikkake Norinaga II, NOR 238) signed works that are identified by the second generation's signature style (which are nijimei and/or contain "Shikkake"). Everything else, all mumei blades, by default will go to Shikkake Norinaga (NOR 237 and NOR 238), without precision on the generation unless made explicitly in the setsumei. That is to say, there is no explicit differentiation between Shodai and Nidai on mumei blades, unless explicitly stated in the setsumei. As for your Oshigata, it fits within one of Shikkake Norinaga's known styles. I can say that it is not his archetypical style, which would features rather tight and conspicuous gunome elements repeating at narrow intervals, which is highly distinctive of Norinaga within the broader Yamato movement. Attached, Juyo Oshigata of a Norinaga I, Denrai to the powerful Matsudaira clan, and zaimei. This blade passed Tokuju on session 9, and is probably the best Tokuju by Norinaga. Notice the tight gunome forming thin ashi all along the surface of the ha. Here is a blade by Norinaga II and bears his distinctive mei. Also a Tokuju, and denrai of the powerful Kaga Maeda clan. Notice the more relaxed notare. While there are still gunome elements and ashi, the structure and repetition is different. I hope this helps. This is not a school attribution. If it was a school attribution, it would simply state "Shikkake" - This is a founder attribution, and it points to Norinaga I and Norinaga II as most probable makers. Both are considered late Kamakura smiths. Best, Hoshi

Hello Denis, Lovely sword. Koto period Juyo blades by school founders are highly valuable. We know that with five blades ranked Juyo Bunkazai, Norinaga has a long tail of excellence. My heartfelt congratulations on passing Juyo Shinsa, especially during these hard sessions. And I appreciate seeing good sword being discussed on NMB, thank you for your contribution. As for your blade: Strengths: - Attributed to a school founder, which is rare: we have ~50 blades certified blades by the founder, of which 21 are signed and Juyo+ - Comes with a nice paired Koshirae (This is a big factor in the West, not so much in Japan) - Sizeable motohaba at 3cm, all else being equal, wide blades are much appreciated. - Passed a hard session on the merit of its deki (not a rare inscription type) Unknowns: We cannot judge the deki from the photography provided, so this remains a question mark. We know that its lower-bound is juyo level, but not the upper bound. Compromises: - Mumei (half of them are signed, so they exist, including dated works) - Short: 64.2cm is on the left tail of the Norinaga Daito length distribution Here are some good questions for you to research: - Where is it situated in Shikkake Norinaga's broader certified corpus? Lower Juyo? middle Juyo? Top 10% (Tokuju candidates), amongst the top five in existence (Exceeding Jubi, approaching Jubun)? - Early, Middle, late work? Can we tell at all? Typical, atypical? Where does it fit in the story of Norinaga and Yamato-den scholarship, and do we learn something new about Shikkake Norinaga from this blade? For an example study of a school founder's corpus, see here. The fact that it is a Juyo blade attributed to a school founder is very precious in and of itself. These are amongst the most desirable Yamato blades, Chin-Chin Cho-Cho. You are a lucky custodian. Best, Hoshi

The game theory on this is interesting...

Hello, This is not a buffet. The Togishi is an artist in his own right. This duality between "hadori bad, sashikomi good" is the wrong way to think about it. Blades are artistically elevated by a sensitive Togishi, who in the process of exercising his craft, decides on the appropriate rendition of the work. Some Togishi are better than others, and in fact this is an understatement. It is not just a matter of being traditionally trained - there are a few Togishi who far exceed all others in the field, and all great blades go to them, which in turns makes it difficult to emerging talent to gain sufficient experience in treating masterpieces appropriately. This is why there is a social component to it, and I think it's appropriate to every once and a while, give an opportunity to a recent winner of the polishing contests held by the NBHTK to work on important swords. This is correct, Ono Kokan, Fujishiro, Hon'ami Nishu, Saito, and other great masters exercise a refined gradient of Hadori appropriate to the blade. Their polishes are precious in their own right. The appropriate amount of hadori on a Masamune blade is not none. The appropriate amount on a run-of-the-mill Kanbun Shinto blade is way, way more hadori. Why? Because the nie is less deep, the nioiguchi is harder, and the hataraki are absent, leaving a 'blank' hamon that is typical of run-of-the-mill Shinto. With a heavier hadori, the otherwise blank Kanbun Shinto will appear with a stronger contrast that is meant to evoke the bright, snowy nie that is typical of Kamakura period masterpieces. The emphasis on "meant to evoke" - because with a trained eye, it of course does not pass. The intention remains. And here I say Shinto - but it's really case-by-case, there are wonderfully active blades with deep nie by smiths such as Hankei, and these should be treated closer to Norishige, which implies a light hadori touch. Another principle: Gentle notare rich in activity is perfect for some tasteful gradient of Hadori applied, the outline of the hamon can be followed by the finger of the polisher and matches the flow. Only on extremely flamboyant hamon and high quality Bizen-den should one truly opt for pure shashikomi in my opinion. When in doubt, better to ask Tanobe sensei. Best, Hoshi

You're most welcomed Peter, Wonderful! Then this article is perfect for you. Nagamitsu and Kagemitsu are such great masters and truly precious, and I hope that one day I will have the time and the material to do a deep dive on both. I'm glad you enjoyed the detailed reviews, I think this is what's most valuable from a learning experience perspective. The Tokyo National Museum has a Juyo Bunkazai kinzogan mei Mitsutada on semi-permanent display, and the Osafune Museum should have one as well. Best, Hoshi

Hi all, You're welcome, thank you for the kind words. It's a labor of love I undertook a few months ago, working on and off. I'm happy with the results. Which grandmaster should I do next? I have Masamune in mind. We barely ever see his work up close in high quality format, just whispers on NMB of his existence... I would like to cover the production costs (~250$/video from which I get pictures also, translations costs, probably totaling ~1000$ per long form article). If we can reach together reach 10x80$/y pledges on Substack, that will give me the confidence that there is an audience for this kind of work. All proceeds will be re-invested into our dear friend Markus's translation and consultant work, and the studio that handles videography. If you care deeply, you can spare a coffee per month, or a sayagaki per year. My time is free of course, it comes from a place of appreciation and desire to share with the community. Best, Hoshi

This is not quite accurate nowadays. The premium on full length blades is much higher than that over a wakizashi, nowadays at least, and it is closer to the double. The exception of course is Koto period Ko-Wakizashi, such as those of Sadamune, which command similar prices to Sadamune daito. Alternatively, items where the blade's deki is a secondary attribute, such as a Horimono-do-saku wakizashi by Tadatsuna, where most of the value is driven by the Horimono and not the blade per se, so wakizashi or daito doesn't make much of a difference. Also, the notion of "normal market price" is curious and I would caution against it, Nihonto are not commodities, perhaps with the exception of a few prolific makers with a high degree of homogeneity across their corpus (e.g., some Tadayoshi). You can establish a floor for the lower end quality items where the nakago carries the value or the attribution carries the value, but beyond that, the quality of the deki and rarity factors will drive the supply/demand dynamics, and hence the price. It's an honor system. However, I believe the transaction is highly likely to conclude. In the past decade, collectors in China have been the biggest market after Japan for elite shinto makers. If I had to place a wager, I would bet that this goes to China. Best, Hoshi

Hi! I can help clarify. In this case, you're buying the Nakago. The sword ranks low in his corpus, hence the low price. This is the Kotetsu baseline price for sleepy work. It's the same with Kyomaro, there is a baseline value for the signature and an ubu nakago, even if the work is from the "hungover Kyomaro" period of his life (or, his mornings). With signed swords, we are often face with a large variance in quality for a given smith. The problem: The nioiguchi of the sword is inconsistent in different sections: there is widening, fraying and narrowing. That's not good on a suguha, and moreover, the nioiguchi is not deep. For Kotetsu, you want a deep nioiguchi, this is what he is known for. Besides that, the lesser issue is that the hada has surprising problems for a Shinto sword, while nagare at the hamachi is textbook for Kotetsu, outside of the hamachi it is disappointing. A good condition, Juyo-level Kotetsu with the textbook deep nioiguchi will run in the ~40M-60M yen range. The absolute topmost works will never be for sale. Remember that the goal of online retail is to sell to folks who treat swords as commodities, this means that they don't understand what they see, but can track prices associated with signature and (wrongly believe) they can tell when something is cheap, or expensive. There is always a reason for the price. it is the winning move to sell overseas in order to arbitrage on this tendency, for big name works with substantive issues which would make for a difficult sell in Japan. Personally, I do not understand the hype of Kotetsu. Probably, simply because I've never had the chance to hold in-hand a topmost work. I keep an open mind. Best, Hoshi

Hello everyone, Thank you for the positive support on the first article, I sincerely appreciate it. I've decided to test the waters and gauge interest in a series of in-depth articles on the grandmasters of Nihonto. This ties into a contentious question which is endlessly engaging for enthusiasts. Who was the greatest maker of Japanese swords in history? Of course, there are many valid answers to this question, but reaching an informed perspective requires knowledge. Much of that knowledge is rather arcane and not readily available in the West. As for the format, it's an attempt to strike a delicate balance between casual storytelling and academic rigor. As you can imagine, collecting data and sources for these articles is a tremendous effort, and this work wouldn't have been possible without the invaluable help of many friends in the field. You know who you are, thank you. I'll be refining the format over time, so if you find it borderline impenetrable or confusing, please let me know, and I'll tune the style going forward. This is a first draft, and I plan to keep it as a living document, updating it as needed. If you have high-quality material on Mitsutada blades—such as beautiful photos—to share and enrich the article, feel free to send me a PM. I'll be sure to credit you as the source. In the same spirit, there are bound to be mistakes that need corrections, along with typos and the like. Any help with polishing is most welcome. Here's the article: https://nihontology.substack.com/p/grandmaster-mitsutada If you're genuinely interested, share with friends in the hobby and encourage them to subscribe, it will encourage me to move forward with this work! I sincerely hope you enjoy reading it as much as I enjoyed researching, Hoshi

Hero Jussi, this is simply wonderful.

Honestly, this is just distasteful @Rivkin. When Darcy was around, it was the same story of vague and unwarranted insinuations. Whenever a dealer offers a high-end object, I sense a certain resentful undertone in you, disguised as some sort of underhanded insinuation of inaccurate description or a subtle denunciation of the Japanese tradition of expertise in the matter. We all remember the "Green papers are mostly good" and "45K TH Masamune filling drawers" and so on. These sentiments come from a dark place. Work on it, because It's genuinely a pity, as I find many of your contributions very valuable to the community, and I say this earnestly.

Here is a signature from the DTI catalogue a few years back. Tokuju Shintogo, although most likely a daimei work with the Kuni and Mitsu characters being those of students, probably Kunihiro. Of note, there are only a small handful of Shintogo Tanto in the NBHTK’s records where daimei can be ruled out, if you take the latest opinion on the master’s authentic signature. Approving a new Shintogo is a big decision. The NBHTK will not validate it unless the workmanship is up to par, and this means it must be in a decent level of polish beforehand. As you can see with the image I posted, the mei is rather close. Note the radical stroke direction on the Mitsu, and the shape of the various elements on the Kuni. Keep in mind that the inclined mid-line on your Kuni is the biggest question mark element, although there is some very rare precedent for it but only in the old Kozan Oshigata (and the mei therein are approximations...) as you can see in the attachment. If the quality and features are aligned with Kunihiro, and with this type of mei material as supporting evidence, you have decent-good odds of it being accepted. However, if the quality and the features of work, once revealed by the polish, are not up to par or leave areas for doubt, it is unlikely that they will expand the canon on acceptable signature variation. As next step, I recommend to take a pen and replicate the mei while marking the stroke direction on every character, then compare with a corpus of Shintogo mei that you assemble in the course of your research. Good luck on your quest.

Dear Lewis, Wonderful project, this is the prime way to learn, and after just one year I have to say that it is impressive and bodes well for the future. My congratulations for researching and taking the jump with "skin in the game" - whatever the outcome, it will be a positive learning experience. Could you post a better photo of the Nakago? I need a close up on the Kuni, and from there, I can help you investigate. Given what little we have here, I tend to agree with @Ray Singer that the most likely scenario is Atelier work. With better material, we could narrow it down. I've spoken to Tanobe sensei in the past about Kunimitsu signature styles, and so I'd say I have journeyman's understanding of the topic. This is a very interesting thread, thank you for posting and sharing your adventure. Best, Hoshi

Hi Lou, I can highly recommend Mandarin Mansion. Peter does great and deep research on what he sells, along with wonderful photos and documentation. As for the sword, I've held it in hand on two occasions, and it is lovely. It has a highly imposing sugata with the broad shape of the kissaki, the position of the shinogi and the wide mihaba, while at the same time extremely fine jigane that is resplendent with jinie, where you feel the influence of Shintogo and the Awataguchi roots immediately. The hamon is very high quality with pure frosty clouds of nie, which is what you want for top Soshu. It leaves a strong saeru impression - a Japanese praise word for swords that evokes brightness and sharpness. Very rare to see such high-end Soshu blades on the open market.

This is insanely good work. Well done, the piece exalts power and faith.

Hello, The kasane per se does not inform you on the state of the sword. The delta between the top of the nakago and the kasane is the indicator you need to pay attention to. There are smith-level trends, school-level trends, and most important: era-level trends on the thickness of the kasane. The most well-known is the transition between Kamakura and Nambokucho, where Nambokucho swords have - on average - a much thinner kasane. As for the structural aspect, remember that it interacts with the thickness and level of the shinogi, the niku, and the width of the motohaba/sakihaba. Controlling for these factors, a thicker kasane indicates a sturdier sword, all else equal, but it is first and foremost a balance of different geometrical elements. Also take note that skilled smiths created a balanced descending gradient between the motokasane and the sakikasane which is one of the most important contributor to the feeling of balance. This descending gradient is generally not uniform - the gradient tapering accelerates towards the tip. This type of geometry is often followed by Soshu-Joko smith (Masamune, Norishige, Yukimitsu, Go, Sadamune), leading to an impressive feeling of balance on a robust and masculine sugata, and this generally drives the contrast with shinto/shinshinto smiths, whose blade tend to feel 'tip heavy'. Koto blades with a thick motokasane (7.5mm+) are considered a plus and can contribute to passing Juyo, and this is generally a strong point. 5.5-7.5mm: normal kasane below 5.5mm : thin kasane Above 7.5: thick kasane Best, Hoshi

Just trust me. Or, if you are so inclined, I suggest your search the forum, read Darcy's old blog, read Markus's sesko blog, pick up a beginner friendly book, etc. This is a topic that has been re-hashed since the dawn of NMB, and I don't have the mental fortitude to dive into it. It's based on 700 years of sword appreciation. But it is also an arcane topic that takes a fairly long investments of time, in-hand experience, reading, etc, to establish what makes a "good" sword.