WORLD COINS - JAPAN - 10 SEN - SHŌWA 20

1945 Japan 10 Sen — Shōwa 20

Postwar Aluminum Type · 22 mm · 1 g · plain edge

01 IDENTITY

Coin Identity

CountryJapan

Denomination10 Sen (0.10 Yen)

Calendar Year1945

Japanese EraShōwa 20

Date Inscription昭和二十年 (coin legend arranged right-to-left)

Coin TypePostwar Aluminum 10 Sen

Issue FormatStandard circulation issue

Minting AuthorityJapan Mint

02 PHYSICAL PROFILE

Physical Specifications

CompositionAluminum

Weight1.0 g

Diameter22.0 mm

Catalogue Thickness1.4 mm [Numista N#5439 secondary figure]

ShapeRound

EdgePlain

OrientationMedal alignment [Numista secondary catalogue]

The 22.0 mm diameter, 1.0 g weight, aluminum composition and plain edge are cross-checked against the Bank of Japan Currency Museum's official historical coin table for the 1946 postwar type. Thickness is retained only as a secondary Numista catalogue value.

03 DESIGN & CONTEXT

Design & Historical Context

Value & Date Side

A large Arabic numeral 10 is placed over a cherry-blossom motif, with the governmental inscription and the Shōwa date.

Rice & Chrysanthemum Side

The opposite side combines the chrysanthemum crest with rice plants and the 10 Sen denomination.

Postwar Context

Japan Mint historical material places the new postwar 10 Sen redesign in the immediate postwar transition; the supplied Numista catalogue contains a 1945-dated entry. Japan Mint also records that production of the 10 Sen and 5 Sen denominations ended in October 1946.

Artwork & Rights Note

No third-party Numista coin photograph is reproduced. The Numista image shown in the supplied source is credited CC BY-NC-SA and is intentionally excluded from this commercial archive package.

04 ISSUE & MINTAGE

Issue Information

Calendar Year1945

Japanese DateShōwa 20 (昭和二十年)

Secondary Reported Mintage237,590,000 coins [Numista N#5439]

Official Annual Mintage VerificationNot located in the consulted Japan Mint / Bank of Japan sources; secondary figure is not promoted to an official total

Mintage Data RuleOfficial source preferred; secondary value retained only where explicitly supplied; blank fields remain blank

Numista N#5439 secondary catalogue figure for the 1945-dated coin.

05 COLLECTION RECORD

Archive Information

Archive IDJP-10S-1945-SHOWA-POSTWAR-AL

Coin Codejp10s45s

QR Short Codejp10s45s

QR Short URLhttps://metacoinart.com/q/jp10s45s

Canonical Path/world-coins/japan/10-sen/1945-1946-showa/1945/

Catalogue Cross-checkNumista N#5439 · Y#68 · JNDA#01-32 · Schön#43

Archive StatusDated issue listed by Numista; Japan Mint historical material describes the postwar redesign and the transition into the new 10 Sen aluminum issue.

06 SOURCES & REFERENCES

References

01 — PRIMARY OFFICIAL SOURCE

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.

Open reference

02 — OFFICIAL HISTORICAL SOURCE

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.

Open reference

03 — OFFICIAL INSTITUTIONAL SPECIFICATION CROSS-CHECK

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.

Open reference

04 — SECONDARY NUMISMATIC CROSS-CHECK

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.

Open reference

Independent research archive. ALL THAT CURRENCY is not affiliated with, endorsed by, or sponsored by Japan Mint, Bank of Japan, or Numista. External sources are linked only as identified references.