blade type: katana, shinogi zukuri
koshirae: Edo, tsuba kaneie mokko gata
tsukamaki: hineri maki, tetsu
nagasa: Showa, itame hada, hamon choji
Nagasa: 71.5 cm. Sori: 1.0 cm.
Moto-haba: 3.4 cm. Saki-haba: 2.5 cm.
Moto-gasane: 0.7 cm. Saki-gasane: 0.6 cm.
Translation side 1: 昭 和 五 十 一 年 八 月 日 / Shouwa gojuuichinen hachigatsu nichi / Meaning: (made in) Shouwa (era) 51th year, 8th month, (on a) sunday.
The 51th year of the Shouwa corresponds to 1976 in our calender. In other words the blade was made on a Sunday in August of 1976.
Translation side 2: 加 藤 兼 國 作 (the kanji are inscribed with a chisel and highly stylized but this should be the correct spelling) / Katou Kanekuni saku / meaning: Katou Kanekuni made this.
There were three smiths with that name and signature working in 1976 (grandfather, father and son): LINK HERE
(not entirely certain about this but I think they correspond to these three smiths)
can`t be sure which one made this particular blade.
here some other swords made by that smith / those smiths:
This one for example, if you click on the pictures you can see it has the exact same inscription:
another one by the same smith/smiths: