日本の夏を生き抜く服装と持ち物——暑さ対策ガイド ✏︎English→日本語→中文 ※本ページはプロモーションが含まれることがあります。 English Japanese summer is not a gentle season. Tokyo regularly exceeds 35°C with a heat index well above 40°C. The UV index reaches "extreme" levels by mid-July. If you're not prepared, the heat becomes genuinely exhausting — and it can be dangerous. This guide covers what to wear and what to carry to get through it comfortably. What makes Japanese summer different The challenge isn't just heat — it's a com