Ichibuban

A silver Ichibuban.

The Ichibuban (一分判) was a monetary unit of Japan.^[1] The Ichibuban could be either made of silver or gold, in which case it was a quarter of a Koban.

The gold Ichibuban of 1714 (佐渡一分判金) had a weight of 4.5 g, with 85.6% of gold and 14.2% of silver. The silver Ichibuban from 1837 to 1854 (Tenpō Ichibugin, 天保一分銀, "Old Ichibuban") weighed 8.66 g, with an alloy of 0.21% gold and 98.86% silver.^[2]

The Nibuban (二分判) was worth double the Ichibuban, and half a Koban and was also a rectangular coin.

Gold Ichibuban (一分判金)

• 
  Keichō Ichibuban
• 
  Kyōhō Ichibuban
• 
  Genbun Ichibuban
• 
  Bunsei Ichibuban
• 
  Tenpō Ichibuban

See also

• Tokugawa coinage

Notes

Japanese currency
	Topics	Bank of Japan Banknotes of the Japanese yen Japan Mint Japanese yen Japanese military yen Japanese invasion money National Printing Bureau Tokugawa coinage Scrip of Edo period Japan
	Coinage	Rin 1r 5r Sen  1⁄2s 1s 2s 5s 10s 20s 50s Yen ¥1 ¥5 ¥10 ¥50 ¥100 ¥500 Pre-1870 Ōban Koban Ichibuban Mon Ryō Wadōkaichin Others ¥20 (Obsolete) ¥1000 (Commemorative) ¥10,000 (Commemorative)
	Banknotes	Sen 5s 10s 50s Yen ¥1 ¥5 ¥10 ¥50 ¥100 ¥500 ¥1000 ¥2000 ¥5000 ¥10,000 Military A yen B yen