Okinawa 沖縄
This is the southern, tropical end of Japan. Naha, the Okinawa prefectural capital, at 26 degrees north, is the same latitude as Miami, Florida.
Japanese think of going to Okinawa as like a domestic holiday version of going to Hawai’i - tropical islands, beaches, warm water & sunshine.
Okinawa’s main island was almost totally obliterated near the end of WWII - and there is still a large and controversial US military presence on the main island.
While most Japanese visitors fly into Naha and stay at resorts on Okinawa-hontō (the main island), adventurous types can explore smaller islands from there by taking a ferry out to the Kerama Islands.