Imperial мarine buttonhole?

[BTR]

Good day to all.
What period and rank?

[Akira Komiya]

It is the rank insignia for the “警察予備隊” or “保安隊” for the rank of captain that was worn under the other insignia you posted on this forum.

[BTR]

Post-war again (
This cockade is probably also from this series?

[ghp95134]

That's a university cap badge.

青學
Aogaku

Abbreviation for
青山學院
Aoyama Gakuin
Aoyama University
old kanji 學 = modern simplified kanji 学

English Wiki page.

-- Guy

[Akira Komiya]

No, this is a pre-war cap badge for a school, Aoyama Gakuin, a Christian school in Tokyo which still exists to this day although their current school badge is different from the one you have.
Please read this article written by my late brother, Nick to avoid being stuck by similar items in the future: Japanese Hat\Cap Badge? WW2 Civilian or Military?

[BTR]

Thanks for the help.

[ghp95134]

Here's how the cap would have looked:



-- Guy

[Akira Komiya]

Good job, Guy-san:
That one certainly looks pre-war/war time.
One interesting thing about the badge is that it does not indicate the level of the school, i.e., middle school, high school, university, etc. This is because the school was classified as a vocational school to circumvent the restrictions on teaching Christianity at schools accredited by the Ministry of Education. (Shinto was the national religion at that time.). Only after the war did they become fully accredited teaching institutions opening a college in 1949.
Regards,

Akira