Japan? China? Vietnam? Need help with ID [opgelost]

Hello,

Could you help me with ID?

The first one came from Japan, the 2 and 3 seems to be Chinese, the 4 may be Vietnam.
Help, please

top left: https://en.numista.com/catalogue/pieces15426.html

2) It could be a sort of charm, inchallah ...

3)
Kangxi °1654 +1722, The 4th emperor of the Qing Dynasty from 1661 to 1722.
Lettering: 康 熙 通寶
Boo Ciowan (Board of Revenue mint in Bejing)
Small crude coin, One dot tong,
Actual weight ~0,7 qian
~1680s-1690s
DH#22.88
Rmq: "Boo" and "Ciowan" are rather rough, but since Hartill qualify the coin as crude ...

4)
Zhenzong, 3rd emp. (997-1022) of the Song Dynasty (960 à 1279)
3rd era: Dàzhōngxiángfú (Xiangfu) 大中祥符 (1008-1016)
Xiangfu Yuan bao - Regular script
DH# 16.52

2) Charm.
Perhaps you can find more info here:
http://primaltrek.com/charmarticles.html

Thank you a lot!