Where does “筆五” come from?

筆五 (Japanese) comes from Japanese 筆, from Japanese 文, from Middle Chinese 文.

筆五 (Japanese): five-yen coin with kanji in regular script, minted from 1949 to 1958 (as opposed to Gothic script, used from 1959 onward)

Definitions

  1. five-yen coin with kanji in regular script, minted from 1949 to 1958 (as opposed to Gothic script, used from 1959 onward)

Ancestry of “筆五”, step by step

筆五 traces back through two separate lines of ancestry.

via Japanese 筆

StepLanguageWordMeaning
1Japanese筆a writing brush, a painting brush, a pen;...
2Japanese文the mon, an old currency; a unit of length for...
3Middle Chinese文—

via Japanese 五

StepLanguageWordMeaning
1Japanese五five; a name of a hole of a wind instrument
2Middle Chineseご—
Every word from Middle Chinese 文 →Every word from Japanese 文 →Every word from Japanese 筆 →
筆五 — Etymology, Origin & Word History | Etymology Explorer