Welcome to the forum, bioforce!
Sorry to disappoint you, but your coins appear to be Chinese cash coins.
The reverse of a Japanese mon would have just lines, like this
Chinese coins bear Manchu script identification of the mint.
The first coin is struck for Hsuan Tsung, 1821 - 1851, by the board of revenue in Peking.
I'd like to see better pics of the other two to correctly ID them.