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Thanks! Yeah, not in a big rush to have it polished. Just a long term goal. There are few spidery black rust areas that didn't show in that first batch of pictures and one nick in the edge. Shown below. Also what looks to me like a forging flaw along the mune. I don't think any of it is getting worse with the conditions I'm keeping it in but eventually I'd like the blade fixed for sentimental more than value reasons.

@Alex A @Matsunoki @Rivkin @ChrisW Thank you for all your replies. As I'm a complete novice when it comes to nihonto all that is very helpful, especially to help narrow it down a little and search further myself about its potential age. Would you think that the koshirae are of a similar age to the blade? Were there particular styles of koshirae that can be attributed to different periods? I'm also wondering if there's anything I should be doing to help preserve it better. I keep a light film of mineral or machine oil wiped on the exposed portion of the blade but that's currently about it. The koshirae and the ray skin on the saya in particular are very fragile and I'd like to keep them in the best condition possible going forwards. Lastly, I've been considering a professional polish (if/when I can ever afford it) and shinsa as well. I'm a little nervous about mailing it long distances and at least for a polish would prefer a togishi I could drive to. Are there any reputable togishi in the northeast United States that you know of or a way to find them on the forum? Again, thank you!

Adding more photos here as I was limited in the previous post.

Hi everyone! -First of all let me know if this is the wrong place to ask this on the forum and I'll move it.- I inherited this wakizashi several years ago and I'm finally getting around to finding more out about it. My great grandfather got it in China, where he served as a chaplain in the 14th air force, after the Japanese surrender in 1945. I have a short document he wrote and signed stating it was given to him by a friend for his help with an aid program in the Changsha region. I believe the friend got it from a pile of surrender swords in Changsha and the document also claims it was a generals wakizashi but doesn't name who. The recent history aside I was primarily wondering what can be gleaned from the attached pictures about the swords age and maker, as well as the koshiraes. Unfortunately there is no mei on the tang. The kogatana does have a signature which I assume is unrelated. Any help isuch appreciated. Thanks!