The 31st Manyoshu Song Festival and Firefly Viewing at Manriki Park, Yamanashi City (June 12–14, Free Admission)
Manriki Park's Manyou Forest in Yamanashi City hosts the 31st Manyoshu Song Festival and Firefly Viewing from June 12 to 14, 2026, featuring firefly watching with guided tours, traditional Manyoshu poetry recitation, live stage performances, and local food stalls — all with free admission.