Japan Rainy Season Guide

Japan’s Rainy Season (Tsuyu)

Japan experiences a distinct rainy season (tsuyu or baiu) typically running from early June through mid-July. This is Japan’s least popular tourist period — but it has genuine appeal for the right traveler.

When and Where

The rainy front moves north: Okinawa (May), Kyushu and Shikoku (early June), Kansai and Tokyo (mid-June), Tohoku (late June). It ends in mid-July, followed by Japan’s hot, humid summer.

What the Rainy Season Is Like

Not constant rain — more like overcast skies with regular rain showers, occasional heavy downpours. Temperatures are warm (20–28°C) and humidity is high. Mold and dampness are common in older buildings. Hydrangeas (ajisai) bloom throughout June — some of Japan’s most beautiful floral displays.

Rainy Season Advantages

• Significantly fewer tourists at major sites
• Lower accommodation prices
• Hydrangea (ajisai) season — Kamakura‘s Meigetsu-in and Hakone‘s Gora Park are spectacular in June
• Lush, deep green landscapes
• Misty atmospherics at temples and shrines — beautiful photography conditions

Tips for Rainy Season Travel

• Bring a compact umbrella or buy one at a convenience store (¥500–1,000)
• Indoor attractions (museums, onsen, temples under roof covers) are excellent choices
• Morning is typically drier than afternoon