JNDA#01-11
The 1-yen brass coin was minted from 1948 to 1950, following World War II. The obverse features the characters “一円” (one yen) and a tangerine, while the reverse bears the inscription “1YEN,” “日本國” (Japan), and the year of minting.
Due to a large surplus of brass after the war, it was used as a material for these coins. However, rising prices caused the face value to fall below the cost of materials, raising the possibility that the coins would be melted down. Consequently, they were withdrawn from circulation on December 31, 1953, at the same time that the sen and rin currency units were discontinued.
| Year | Mintage | |
| 昭和二十三年 Showa23year 昭和二十四年 Showa24year 昭和二十五年 Showa25year | 1948 1949 1950 | 451,170,000 |
| Material | Brass |
| Composition | Copper 600-700 Zinc 400-300 |
| Weight | 3.20g |
| Diameter | 20mm |
They are inexpensive to collect.
There is an aluminum prototype from 1950, but it is expensive.
