Wakizashi no-signature
Blade length 54.0cm, thickness at the base 7mm, width 3.0cm
This is a nice wakizashi blade. But difficult to suppose the age or smith.
Steel is fine, and it has a wood grain layer pattern.
Hamon is mainly made of large particles. The temper line (particle band) is bright. And its pattern is active Gunome or so. One interesting point is the yakiotoshi about 2cm. Utsuri also starts around the part. Total taste of the work suggests some Osafune smith in 16th century. But the yakiotoshi is rare for them.
Polishing is Hadori style (the modern style), but the hadori work is not too strong to study the blade itself. However, the blade surface has some rust and many scratches. Probably it was used for cutting performance. But still the condition is enough to study the good quality of the blade.
Tang
On the omote side, the meat around the middle part is slightly decreased. Probably smith's signature is removed by filing work. We can guess some reasons of such work. For example, a crook dealer removed the signature of the smith who is not very famous, and attributed it to a famous one. In other case, it had a fake signature on it, and it was removed. Anyway, the tang suggests the unknown history of this blade.
We found an interesting sign on the back of the tang. It is placed being masked under the habaki. It is made by two letters. The first one is "se", and the second is difficult to read. It may be a secret sign of the smith or another craftsman.
Habaki is gold foiled.
Shirasaya and bag
100,000.yen
This is a good sample to study what good quality blade is, especially for beginners. You can learn fine steel and bright hamon. And you can also learn how to hold a blade against a good lighting to study the real hamon masked under the hadori work (cosmetics of polishing).
There is a description on the scabbard (saya-gaki) written by Kanzan. It says "Bizen -no-kuni Osafune Sukesada, no-signature Shinto". But it doesn't matter.