Is this Shingane?

[Itomagoi]

Hello everyone,
do I see that correctly and it is Shingane (core steel)?

[Ray Singer]

Peter, this appears to be hardened areas extended off the hamon (an extension of the yakiba). Shingane does not look like this. 

[Volker62]

with reconnizable nioi, nicely circled

 

nothing to do with core steel Peter

[Itomagoi]

Thank you Ray and Volker.
And again I have learned more about nihonto.

[Jacques]

 This is not a sign of quality because it indicates a bad mastery of tsuchioki. 

[Itomagoi]

Okay, but this is Shingane. :-)))

[Ray Singer]

48 minutes ago, Itomagoi said:

Okay, but this is Shingane. :-)))

 

 

No, I would say those are open fukure, however you *may* be seeing into the shingane at the bottom of the fukure. A fukure can also happen totally within the kawagane. I have seen swords where the fukure was removed though additional polish, and the underlying steel had not exposed the shingane yet. 

 

 

[Volker62]

I've seen some with "patched steel " umegane"

 

that was inserted into the steel surface

[vajo]

This looks cool. You can make a glas over it and everybody could look inside the blade.

[rematron]

17 hours ago, vajo said:

This looks cool. You can make a glas over it and everybody could look inside the blade.

Yeah! The Visible Nihonto. Lol

[John C]

On 12/31/2022 at 12:54 AM, Itomagoi said:

do I see that correctly and it is Shingane (core steel)?

I have seen similar pictures in an article about slag being left in the steel during the forging process. Maybe just under the "skin" and brought out by the polishing?

John C.