Hiroshima vs Okinawa

Hiroshima

Hiroshima has a humid subtropical climate with four distinct seasons. Summers are hot and humid, winters are mild compared to northern Japan, and spring cherry blossoms and autumn foliage are spectacular. The rainy season (tsuyu) runs from mid-June to mid-July.

Okinawa

Okinawa has a subtropical oceanic climate — warm year-round, with a distinct rainy season (tsuyu) in May–June, typhoon season from July through October, and a mild winter that barely qualifies as cold. The sea temperature is swimmable from April through November.

Hiroshima

Hiroshima has an extensive streetcar (tram) network — the oldest and largest in Japan — supplemented by buses and a good cycling infrastructure. The tram system connects the station to Peace Park, the castle, and the Miyajima ferry terminal. An IC card (ICOCA/Suica) works on all public transport.

Walkability: Hiroshima is very walkable within the central area. Peace Memorial Park, the Atomic Bomb Dome, Hiroshima Castle, and Shukkeien Garden are all within a 25-minute walk of each other. The flat river delta terrain and well-maintained sidewalks make walking easy. The Hondori shopping arcade provides covered walking in any weather.

Okinawa

The main island has a single monorail line (Yui Rail) in Naha and a bus network that is slow and complex. A rental car is virtually essential for anything north of Naha or off the urban core — this is not a city built for public transport.

Walkability: Good within Naha's Kokusai-dori area and around Shuri Castle. Very low elsewhere — Okinawa's main island sprawls along a north-south axis with attractions spread across 100+ km. A car is not optional for serious exploration.