海軍協會 - Kaigun kyōkai/Navy League [association/society/organization]
"Naval institute" (translation that was popularized by one dealer) is simply incorrect.
Source.
Russian article Japanese Naval League (Kaigun Kyokai) (1917-1945) by Sofronov Timofey Yurievich.
![1.jpg 1.jpg](https://asiamedals.info/data/attachments/323/323808-b4ae99dc4e4f7411ccc5a1666eb3259a.jpg)
![2.jpg 2.jpg](https://asiamedals.info/data/attachments/323/323809-7533e1fc1b2f1280c8a85f16b231bb99.jpg)
![3.jpg 3.jpg](https://asiamedals.info/data/attachments/323/323810-ba8945995138ea61c85a44cc95f12bcb.jpg)
![4.jpg 4.jpg](https://asiamedals.info/data/attachments/323/323811-ae7db353cabc7241246db3ea431591ab.jpg)
Source.
Bulletin of Irkutsk State Technical University