Japan's rainy season (tsuyu or baiu) typically runs from early June to mid-July in Honshu. It's the least popular time to visit, which means lower prices, smaller crowds, and — if you know where to go — some genuinely beautiful experiences.
Rainy Season Timing by Region
Okinawa: Mid-May to late June (finishes earliest — often sunny by late June). Kyushu, Shikoku: Early June to mid-July. Honshu (Tokyo, Kyoto, Osaka): Early June to around July 20. Hokkaido: No official rainy season — June can be Japan's nicest weather for Sapporo.
What the Weather Is Actually Like
Tsuyu is not constant rain. It's more like a period when cloudy days dominate with intermittent rain, some clear days, and occasional heavy rain events. In a typical June week in Kyoto: 3–4 days of light rain or overcast, 1–2 days of sun, 1 heavy rain day. Temperatures are comfortable: 22–27°C, not yet August's brutal heat.
Why June Is Underrated
Hydrangea (ajisai) season: June is peak hydrangea season — Kamakura's Hasedera and Meigetsu-in temples are stunning with blue, purple, and pink blooms. No crowds: Kyoto temples in June are as close to empty as they get. Lower prices: Accommodation 20–40% cheaper than spring and autumn peaks. Lush green: Rain keeps gardens vivid — Kyoto's moss gardens and temple grounds look best in June.
Best Places in June
Kamakura: Hydrangeas everywhere. Kyoto temple gardens: Saiho-ji (Kokedera moss garden) and Tofukuji look exceptional after rain. Hokkaido: Avoid the rainy season entirely. Okinawa: If timing works (before mid-June), beat both rainy season and summer heat.
What to Pack
A compact umbrella (buy at any 100-yen shop in Japan — ¥500–¥800 for a decent one). Waterproof shoes or sandals. A lightweight rain jacket rather than an umbrella for hiking. Quick-dry clothing.