What to wear to Rainbow Disco Club: Higashiizu sits at 22°C (72°F) by day and 12°C (54°F) at night in May, on mountain, with a moderate chance of rain. That means a light base with one warm layer you can carry, broken-in boots or sturdy trainers, and a bag small enough for the gate rules. The crowd leans techno, gorp and camping, so black and functional reads as insider.
| Typical daytime high | 22°C (72°F) |
|---|---|
| Typical night low | 12°C (54°F) |
| Day–night swing | 10°C (18°F) |
| Rain risk | Moderate |
| Ground | Uneven slopes and stone |
| Sun exposure | High during the day, no shade at the main stages |
Everything below follows from those numbers.