Design side
Young tree sprout and the inscription 日本国.
Young tree sprout and the inscription 日本国.
The numeral 1 and year 平成四年.
The lightweight aluminium 1 Yen coin has been issued in this design since 1955.
The 250,000 figure is a set issue quantity reported by a secondary catalogue; it is not presented as an official Japan Mint proof coin production figure. Official year-date production totals cover other finishes and must not be substituted.
Official description of the standard six-coin proof set and proof finish, from a modern edition; not evidence of the 1992 issue count.
Open reference ↗Official year-date production totals, supplied for context; not an independent proof-set count.
Open reference ↗Specifications for Japan’s standard circulation denominations. The current 500 Yen version is not the 1992 type.
Open reference ↗Secondary catalogue entry for the six-coin contents and 250,000-set issue figure.
Open reference ↗