Hiroshima vs Oʻahu

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.

Oʻahu

Oahu has a tropical climate with just two real seasons — a warmer, drier summer (kau) and a cooler, wetter winter (hooilo). Temperatures stay remarkably steady year-round thanks to trade winds off the Pacific. The leeward (south/west) side is drier and sunnier; the windward (north/east) side is greener and wetter. Expect brief showers that pass quickly, leaving rainbows behind.

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.

Oʻahu

Honolulu has TheBus, one of the most extensive city bus systems in the United States, and the brand-new Skyline rail (first segment opened 2023). But to really see Oahu — especially the North Shore and windward coast — you'll want a rental car for at least part of your trip. Rideshare is widely available in the Honolulu/Waikiki area.

Walkability: Waikiki is very walkable — most hotels, restaurants, and the beach are a short stroll apart. Downtown Honolulu and Chinatown are also pleasant on foot. Outside those areas, the island is built around cars, with long distances, limited sidewalks, and no pedestrian infrastructure on the coastal highways.