1000 Yen - Reiwa Yambaru National Park

Yambaru National Park, established in 2016 in northern Okinawa, protects one of the last remaining subtropical broadleaf forests in Japan — habitat for the Okinawa rail, a flightless bird that exists nowhere else on earth. The park was designated a UNESCO World Heritage Site in 2021, which directly prompted this commemorative issue under the Japan Mint's ongoing national parks series.

The series has issued coins for dozens of parks since its inception, but Okinawa entries attract particular secondary-market attention given the prefecture's distinct cultural identity and the relative difficulty of sourcing issues outside Japan without significant premium.