Japan will be entering the rainy season called "tsuyu" from June onward. This period also experiences high temperature, and you might feel uncomfortable, but with these items, you should be able to have a pleasant time this season!
Japan enters the rainy season called "Tsuyu" in June. The humidity is very high during this period and its not a great environment but if you have these items, you'll be able to spend your days a bit better!