Japan 1943 (S18) sen

from the Mountain Groan Collection

This specimen was struck for Japan by the Tokyo mint, which issued this type 1941-43. Until 1938, the sen was a bronze coin, 3.75 g. It was aluminum 1940-43. The denomination was terminated after 1946, the victim of inflation and the disaster of World War Two. Two different weights exist for 1943.

Recorded mintage: 1,163,949,434 (Y59) plus 627,160,000 (Y59a).

Specification: 0.65 g, aluminum, 22 mm diameter (Y59) or 0.55 g (Y59a).

Catalog reference: KM Y59 or Y59a.

Source:

• Michael, Thomas, and Tracy L. Schmidt, Standard Catalog of World Coins, 1901-2000, 47th ed., Iola, WI: Krause Publications, 2019.
• The Catalog of Japanese Coins and Banknotes, Tokyo: JNDA (Japanese Numismatic Dealers Assn.), 2014.

Link to:

• 1940 sen
• Japan 1942 (S17) 10 sen
• Japan (1945) sen baked clay
• Coins and currency dated 1943