(I make a mistake saying the word on the folder is chinese word where it is actually japanese word , some of the japanese word share the same character with the chinese word and i was kind of sleepy when i do the video . Please forgive me for that mistake )
Year of Issue: 1988
Material: All Cupro-nickel except 10 Yen is bronze, 5 Yen is brass, 1 Yen is aluminum
Mintage: unknown
(Denomination):(Standard weight):(Standard Diameter)
500Yen: 7,2gm: 26.5mm
100 Yen: 4.8gm: 22.6mm
50 Yen: 4.0gm : 21.00mm
10 Yen: 4.5 gm: 23.5mm
5 Yen: 3.75gm : 22.0mm
1 Yen:1.0gm : 20.0mm
Minted by Mint Bureau Japan