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Japanese coinage was reformed in 1948 with the issue of a brass one-yen coin. 451,170,000 coins were minted until production stopped in 1950. [18] The obverse of these brass coins features a numeral "1" with "State of Japan" above, and the date below, while the reverse reads "One Yen" with a floral pattern below it. [ 18 ]
A balance puzzle or weighing puzzle is a logic puzzle about balancing items—often coins—to determine which one has different weight than the rest, by using balance scales a limited number of times. The solution to the most common puzzle variants is summarized in the following table: [1]
As a measurement, Momme is part of a table of Japanese units where during the Edo period it was equal to 1 ⁄ 10 ryō (aka Tael). Since the Meiji era 1 momme has been reformed to equal exactly 3.75 grams in SI units. [2] The latter term for Momme refers to when it was used as a unit of currency during the Edo period in the form of silver coins.
This coin is notable for being the first 5000 yen gold coin that was reduced in both weight and size, and the first 0.25 oz gold coin ever minted by Japan. [11] The set diameter of 30 mm and weight of 15 g that had been used for all of the prior coins was changed to 20 mm and 7.8 g for this gold issue. [12] For a design, the obverse features ...
The 100 yen coin (百円硬貨, Hyaku-en kōka) is a denomination of Japanese yen. These coins were first minted in 1957 using a silver alloy, before the current design was adopted with an alloy change in 1967. [1] It is the second-highest denomination coin in Japan, after the 500 yen coin.
Early 1-yen coin from 1901 (Meiji year 34), 26.96 grams of 90% fine silver 20 yen coin from 1870 (Meiji year 3) In 1897, the silver 1 yen coin was demonetized and the sizes of the gold coins were reduced by 50%, with 5, 10 and 20 yen coins issued. After the war, brass 50 sen, 1 and 5 yen were introduced between 1946 and 1948.
The first 1000 yen coin was issued in 1964 to commemorate the Tokyo Olympics. Since then, the Japan Mint has issued various 1000 yen coins commemorating various subjects and events of Japan's history. The recent 1000 yen commemorative coins now have color applied to parts of the coin's design.
The 500 yen coin (Japanese: 五百円硬貨, Hepburn: Gohyaku-en kōka) is the largest denomination of Japanese yen coin issued for circulation. These coins were first struck in 1982 as the vending machine industry needed a higher valued coin for use in their machines.