1945–1946 Japan 10 Sen — Shōwa Postwar Aluminum Type
Shōwa 20–21 · 22 mm · 1 g · rice ear, cherry blossom and chrysanthemum motifs
Select a Year
Each calendar year has an independent archive page. The 1945 secondary mintage figure is preserved as supplied; the 1946 blank mintage field is not filled by inference.
Postwar Aluminum 10 Sen
Japan Mint historical material describes the redesign of the 10 Sen after the war, replacing the former national wording with the new postwar form and using rice-ear imagery. Official Japan Mint history and the Bank of Japan Currency Museum identify the 1946 postwar aluminum standard at 22 mm and 1 g.
Official Sources & Catalogue Cross-check
Japan Mint — 150 Years of History
Official Japan Mint history documents the postwar restart of coin production, the new-form 10 Sen aluminum coin, the January 25, 1946 establishment of the 10 Sen aluminum coin standard, and identifies the 1946 coin as 22 mm / 1 g.
Japan Mint — Mint Club No. 78
Japan Mint explains that after the end of the Pacific War a newly designed 10 Sen aluminum coin using rice-ear imagery was introduced, and that production of 10 Sen and 5 Sen coins ended in October 1946.
Bank of Japan Currency Museum — Coins Since the Meiji Era
The Bank of Japan Currency Museum lists the postwar 10 Sen aluminum coin with rice-ear / cherry-blossom design, aluminum composition, plain edge, 22.0 mm diameter and 1.0 g weight, with issue beginning in 1946.
Numista — Japan 10 Sen, Shōwa (N#5439)
Secondary cross-check for 1945–1946 dating, type-level physical data, inscriptions, catalogue identifiers and the supplied 1945 mintage figure. The 1946 mintage field is blank in the supplied table and remains blank in this archive. No Numista photograph, valuation table, logo or catalogue prose is reproduced.
Dating note: official Japan Mint sources describe the postwar redesign across the 1945–1946 transition, while the Bank of Japan specification table starts this standard in 1946. This archive therefore preserves the dated 1945 and 1946 catalogue records without converting that institutional difference into an unsupported claim about exact production timing.