Japan

20 coins
Tenpō

Bronze, 20.7 g
Meiji

Bronze, 14.3 g, ⌀ 31.8 mm
Shōwa

Aluminium, 1 g, ⌀ 20 mm
Heisei

Aluminium, 1 g, ⌀ 20 mm
Shōwa, Old script

Brass, 3.75 g, ⌀ 22 mm
Shōwa, New script

Brass, 3.75 g, ⌀ 22 mm
Heisei

Brass, 3.75 g, ⌀ 22 mm
Shōwa

Bronze, 4.5 g, ⌀ 23.5 mm
Shōwa

Cupronickel, 4 g, ⌀ 21 mm
Heisei

Cupronickel, 4 g, ⌀ 21 mm
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