Strange lump near to Mune maki

[Moley]

Hi everybody,

I have an Mino - Yahazu Midare Katana that has a very strange bump near the Mune maki. It dosn’t quite touch the habaki.

Even though not exactly centered, it does have a ridge line. (or remnants of one)

Any idea as to what it is?

[Mark]

looks like a fukure that has opened up

[Shugyosha]

Looks like it was put there to me - maybe to receive a catch mechanism? Looks too regular for a fukure to me, but not something I’ve seen before. 

[ROKUJURO]

Gwyn,

to me it looks like a damaged MUNE MACHI (not MUNE MAKI). Although the photos are not perfect, I think I can see that the little offset is not at a right angle as it should be. This 'phenomenon' is certainly not deliberately made in the manufacture of the blade, but had occurred later.

A little MACHI OKURI will have to be done to remove the flaw/defect. 

 

[Sunny]

Looks to me like someone used a small thin flathead and a hammer to pop a habaki off that was stuck.

It bumped/slipped and went high due to being a very thin sharp tipped flathead but still caught pushing some of the metal forward.

Or i could be very wrong.

[Peter Bleed]

I think it is the rear sight.

P