The , commonly known as the Proof Set in the United States, is a set of
proof coins sold by the
Japan Mint
The is an Independent Administrative Institution of the Japanese government, responsible for producing and circulating the coins of Japan. The agency has its head office in Osaka with branches in Saitama and Hiroshima. The Japan Mint does not p ...
. These sets were first issued in 1987 (
Shōwa 62) as "regular proof sets" consisting of denominations of
1,
5,
10,
50,
100
100 or one hundred (Roman numeral: C) is the natural number following 99 and preceding 101.
In mathematics
100 is the square of 10 (in scientific notation it is written as 102). The standard SI prefix for a hundred is " hecto-".
100 is the b ...
, and
500 yen (666 yen total). In addition to "regular", those made since 1997 have also been referred to as "special", as these sets include a decorative case and in some instances a non-legal tender
medal
A medal or medallion is a small portable artistic object, a thin disc, normally of metal, carrying a design, usually on both sides. They typically have a commemorative purpose of some kind, and many are presented as awards. They may be in ...
. Proof coinage is not intended for circulation as these are targeted towards collectors.
Regular proof sets
Shōwa
Heisei
Reiwa
All of the case sets issued during the
Reiwa era
is the current and 232nd era of the official calendar of Japan. It began on 1 May 2019, the day on which Emperor Akihito's eldest son, Naruhito, Enthronement of the Japanese emperor, ascended the throne as the 126th Emperor of Japan. The da ...
have been in dark blue. As the 500 yen coin was redesigned in 2021, two varieties of proof sets exist for that given year.
Special proof sets
Sets colored in yellow include all 6 denominations of yen with a
medal
A medal or medallion is a small portable artistic object, a thin disc, normally of metal, carrying a design, usually on both sides. They typically have a commemorative purpose of some kind, and many are presented as awards. They may be in ...
.
Heisei (SPS)
Reiwa (SPS)
See also
*
500 yen coin (commemorative)
Notes
References
{{Japanese currency and coinage
Coins of Japan