Very odd mune

[Ken-Hawaii]

I don't recall having seen a blade where the mune shrinks by 2/3. Any ideas why a tosho would do this? I guess it could be cut down, but I'm not sure what the original blade would have been.

 

https://www.ebay.com/itm/Signed-Mihara-Wakizashi-Sword-Japanese-Antique-Katana-Nihonto-tsuba/184052534391

 

[PNSSHOGUN]

First guess would be Kanmuri Otoshi sugata.

[Ken-Hawaii]

I thought about that & also unokubi-zukuri, but this blade just looks strange, not really "scalloped" like those sugata.

[PNSSHOGUN]

Perhaps it was originally one of those shapes and then badly polished? The polish work is pretty crude.

[16k]

I’d say kanmori otoshi too!

[BenVK]

I suspect this is the result of "removing" one or more deep cracks in the shinogi -ji

[Ray Singer]

This looks like a typical Kanmuri-otoshi sugata. What is unusual here is the placement of the mei right at the bottom of the nakago, on what appears to be ubu Sue-koto blade. I don't know offhand of any cases where the Kai Mihara smiths simply signed 'Mihara'.

[Ken-Hawaii]

I missed that one, Ray. The kanmuri-otoshi blades I've owned all looked scalloped, for lack of a better term, but this one looks more like it was just cut away, perhaps to get rid of some major flaw, as Ben suggested. But I also don't see signs of core steel.

[Stefan]

It is  Kamuri Otoshi. Blade  quality is pretty low. .Slight scratches, O.K, it is out of any  polish. To discuss any signatures in this state...no.

By the way, i am not sure if the boshi is there. The polish is to crude.

[SAS]

If the hamon that is visible is the actual hamon, the boshi is yakitsume. Ko maru was more usual for Mihara school works during Muromachi according to Nagayama. Is it possible that this sword could be slightly suriage and reshaped to carry as a wakizashi from an original (older) form as a pole arm weapon?

[BenVK]

I suspect this is the result of "removing" one or more deep cracks in the shinogi -ji

 

Maybe I'm seeing things that are not there but bear with me..

The shinogi-ji on one side of this blade seems ok but something else has happened to the other side which I've marked in red.

[Ken-Hawaii]

Yes, that's definitely odd, Ben.