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Osaka Prefecture is one of the prefectures in Japan's Kansai region, with the prefectural capital located in Osaka City. During 1991–2020, the hottest month on average was August, with a monthly average temperature of 27.5°C; the coldest month was January, with a monthly average temperature of 4.4°C; the wettest month was June, with monthly rainfall of 193.5 mm, and annual rainfall was 1455.4 mm.

Okinawa Prefecture is one of Japan’s prefectures, located in the southwesternmost part of Japan, and its prefectural capital is Naha City. Its name comes from the Okinawan people’s self-designation for the main island, and in 1879 it was reorganized from Ryukyu Domain into Okinawa Prefecture. The entire area has a subtropical climate, with warm temperatures and abundant rainfall throughout the year; the average temperature in July is 28.2°C, the average temperature in January is 17.6°C, the average monthly rainfall in June is 215.4 mm, and the annual rainfall is 1753.3 mm.

Yamanashi is best known for its views of Mount Fuji. Take the Lake Kawaguchi Ropeway for sweeping views of the mountain and lake, see the Chureito Pagoda with Mount Fuji in the background at Arakurayama Sengen Park, stroll around Oshino Hakkai, or watch the sunrise while soaking at Hottarakashi Onsen. August can be hot, so plan breaks and stay hydrated. July is rainy, so it’s a good idea to have indoor alternatives.