Possible Yamato Katana with Masaware?

[kkeeps]

Hello fellow collectors. I would like to know if I'm heading in the right direction on this blade. With my limited knowledge, I'm guessing Yamato circa 1300's? There are several instances of what I would assume to be masaware on this blade.

 

Here are the measurements:

iori mune

Chu-kissaki 3cm

O-suriage

 

Nagasa: 62.6cm

Nakago Nagasa: 14.8cm

Sori: 1.6cm

Moto-haba: 2.82cm

Saki-haba: 1.85cm

Kasane: 6.1mm

Shinogi-haba: 6.8mm

 

 

 

[kkeeps]

[kkeeps]

[kkeeps]

[Rivkin]

Its almost certainly not koto, therefore Yamato attribution can be difficult.

[kkeeps]

So Shinto or ShinShinto?

[Rivkin]

I would even go shinshinto, but hard to be certain.

[kkeeps]

Are there tell-tale signs that would make that call? I am hoping to learn from this blade considering I'm far off in age.

 

Here's another pic of the hamon as well.

[Rivkin]

You can see hamon at places, but the hada is essentially a glass-like mirror surface - this is very late. Straight without tapering with largish kissaki - often shinshinto. Nakago looks unusual for the period, maybe a bit earlier.

[kkeeps]

Are you talking about the kissaki taper or the sori of the blade?

 

Would you classify the straightness from the munemachi to the tip or the whole blade including nakago to arrive at shape?

 

[Rivkin]

Good point, forgot it was shortened... Then can be shinto.

[FZ1]

10 hours ago, kkeeps said:

Would you classify the straightness from the munemachi to the tip or the whole blade including nakago to arrive at shape?

 

For the purpose of measuring sori, it is from the munemachi to the tip of the kissaki.

 

[kkeeps]

That's how I have been measuring sori in the original post.

 

I've been trying to imagine the original shape of this o-suriage blade, but can only compare it to other o-suriage blades I dig up in pics on the internet.