Pack or skip
Insect repellent for Tokyo in October
Verdict
Pack it
Warm (71°F) plus 9 rainy days = mosquito conditions.
Why
Tokyo in October averages highs of 71°F, lows of 58°F, 9 rainy days.
That climate means insect repellent earns its space in the bag. Warm (71°F) plus 9 rainy days = mosquito conditions.