岐阜県・関鍛冶伝承館が人気漫画「花の慶次」とコラボ　戦国時代の前田慶次所用「南蛮鉄大短刀」「皆朱の槍」を再現
https://www.kyodo.co.jp/news/2024-03-22_3846949/

There are a few names in Japanese for a knife like this. The maker of this knife, Hattori Ichiro, calls it a "katana knife" for the American market. I prefer a different name.

In the movie Rashōmon, the dagger wielded by The Wife character is precisely this style, and the word used in the movie is 短刀 (tantō). This is the best word for this dazzling machine.