Help with Translation on WW2 Blade

[Zperson16]

Recently picked up this blade and I'm curious if it is authentic and if so, who forged the blade along with on the handle it has a silver flower that I haven't seen before on a WW2 blade.

Hoping someone can shed some light on this blade. If a better look at the tang is needed let me know. Thanks

 

 

 

[xiayang]

一刀斎安綱 = Ittōsai Yasutsuna

二千六百年 = year 2600 (in the Imperial reckoning, corresponds to 1940 CE)

 

You can find a few discussions about this smith on the forum, e.g.,

 

 

 

[uwe]

That silver “flower” is a family crest (紋, mon). It’s called “丸に木瓜” (Maru ni mokkō, melon in a ring).

[Bruce Pennington]

Hi Zack!

You may already know about your sword, but in case you don't - It's a Type 98 Japanese officer sword (gunto).  You can see plenty of other examples on Ohmura's site here: 

Army commissioned officers Shin-Guntō (Type 98 Guntō) 1938 (ohmura-study.net)

 

The small stamp at the top is called the "Showa" stamp, and is an approval stamp of the Seki Cutlery Manufacturers Association.  Blades with this stamp are usually nice quality, non-traditionally made.