What is japanese 50 sen coin?

The Japanese 50 sen coin was a unit of currency equivalent to half of one yen. It was minted in 1917 and remained in circulation until 1959. The coin featured a hole in the center, common in Japanese coins, and the obverse side was inscribed with the Japanese characters for "Bank of Japan." The reverse side featured the number 50 and the year of minting. During the Second World War, the 50 sen coin became smaller and was made of a lower-quality material due to Japan's economic situation at the time. However, after the war, the coin was reissued with its original design and size. The 50 sen coin is now considered a collectible item among coin enthusiasts.