kizu: help for a blade

[sc72]

Here are some "kizu" on my katana. I would like your analysis to be sure of the "Japanese name" of these defects and their severity or otherwise.

Thanks

 

1) LINE Inside the "bo-hi" (only one side of blade)

2) Point near hamon 

 

[sc72]

[sc72]

[sc72]

This is the blade with "bo-hi"

[sc72]

Another thing is a strange color  on the IORI MUNE (side opposite Hamon)

Is this a KIZU?

 

 

[Lewis B]

Which school and era does this blade paper to (assuming its been through Shinsa)? Pretty sure the feature in the bi-hi is a kizu from forging. The black marks are likely some form of corrosion activity. Have they been there since you owned it or developed recently?

[sc72]

I bought in AUCTION this blade 2 weeks ago and today it is in my hand.

It is from Edo period (first or middle), "shinto".

I think the first KIZU  is a "fukure" and the second KIZU it is "jiare", but your opinion it's important.

About the strange color of top of blade (it'a a "Iori-mune" with "V" up) I don't know 

[sc72]

No paper or Hozon, 

[sc72]

[sc72]

The auction description said  "good condition" blade...

 

[sc72]

I hope nothing of "very serious" kizu, the sword is my first katana and I like this sword

[sc72]

Your every opinion is welcome

[Shugyosha]

Severity kind of depends on scale and it’s hard to judge the size of these flaws just from the photos. The fukure might just be a delamination that follows the circular grain of the steel rather than an air pocket. 
 

As Lewis says, the dark areas are kitae ware with some old, stabilised corrosion in them. 
 

The one I would be worried about is the ware with a white something extending down towards the edge. Do you have a better picture of this? I see nothing fatal so far, but I’d reserve judgement on this last one. 

[sc72]

tell me the point of blade that you mean

[sc72]

do you mean the Hamon?

 

[Lewis B]

  On 7/9/2024 at 4:33 PM, sc72 said:

do you mean the Hamon?

 

Expand  

I think this is the area that needs clearer pics. 

[Shugyosha]

  On 7/9/2024 at 1:12 PM, sc72 said:

Expand  

The top picture here. Are they both of the same area? 

[Shugyosha]

Yep, sorry, posts crossed. Anything similar on the other side in this area? 

[sc72]

Yes sam area, I think it is a hair

[sc72]

[sc72]

It is so little that I-phone try to find it

[sc72]

The same blade area without  5X.  it is almost invisible

[sc72]

DX in the center on Hamon

[sc72]

Here a better photo of the first kizu in the Hi

[sc72]

Let me know

 

[Lewis B]

  On 7/9/2024 at 5:01 PM, sc72 said:

Here a better photo of the first kizu in the Hi

Expand  

Thats a lot clearer. I'm assuming they are less than a cm at the widest point? To have 2 almost identical features like that does not suggest Fukure which would be random. 

[Matsunoki]

Flaws in deep bohi are often core steel showing through in patches. Looks a bit like that but images can mislead. 
Black spots look like old stabilised rust not fully removed by polisher. 
Bit worried about the flaw in the hamon……hagire?

[Gilles]

Like John said "The one I would be worried about is the ware" next to the HA (in the HAMON I guess). It is never a good thing but it is a little one.

Obviously, the BOHI were carved to hide some ware.

[Lewis B]

  On 7/9/2024 at 5:13 PM, Matsunoki said:

Bit worried about the flaw in the hamon……hagire?

Expand  

He said it was a fibre, and the later pics show it's gone. 

[Lewis B]

  On 7/9/2024 at 5:14 PM, Gilles said:

 

Obviously, the BOHI were carved to hide some ware.

Expand  

Really? I thought it was the swordsmiths artistic expression and/or a way reducing the weight of the blade.