Pack or skip
Sunscreen for Osaka in April
Verdict
Pack it
Sun still finds you at 67°F — UV doesn't care about temperature.
Why
Osaka in April averages highs of 67°F, lows of 50°F, 10 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 67°F — UV doesn't care about temperature.