Tokyo Prefecture. Coastal. The undisputed capital. A capital with 0% food self-sufficiency that devours resources from rural areas, causing extreme centralization in Japan. Occasionally attends global city conferences and works with London, New York, and Shanghai. Due to extreme centralization, the population of the metropolitan area alone is massive. Around 2026, its GDP was overtaken by Shanghai, making it the 4th largest GDP in the world. Because the 23 Wards are so dominant, the Tama region often fades into the background. Ranked 1st in population, far ahead of 2nd-place Osaka.

Osaka Prefecture. Coastal. The central city of Kinki with 1% food self-sufficiency. Around 2026, its GDP was overtaken by Aichi, dropping it to 3rd place. (However, Kyoto and Hyogo still tend to provoke it.) Its rival is, of course, Aichi, which hosts TOYOTA. Speaks in a Kansai regional accent. Gets angry if people say it only has takoyaki. Ranked 2nd in population. Home to many famous places and foods like Osaka Castle (a historic symbol built by Toyotomi Hideyoshi), Tsutenkaku Tower, Universal Studios Japan (USJ), and okonomiyaki!

Aichi Prefecture, home to the global company TOYOTA. Coastal. The representative prefecture of the Chubu region (though the region itself lacks unity as everyone does their own thing). Famous for Shachihoko (golden tiger-carp) and TOYOTA. Also associated with Oda Nobunaga. Often teased as "Nagoya Prefecture." Boasts the highest value of manufactured goods shipments in Japan, making it the strongest industrial prefecture. Ranked 3rd in population. Home to many famous spots and foods like Ghibli Park (a popular spot in Nagakute's Expo Park that recreates the world of Studio Ghibli), Inuyama Castle, hitsumabushi (eel), and LEGOLAND Japan!

Fukuoka Prefecture. Coastal. The representative prefecture of the Kyushu region. Famous for many things like Hakata Ramen. Self-proclaimed member of the "Big 4 Cities of Japan." Speaks in a Hakata regional accent. Home to many famous places and foods like Dazaifu Tenmangu Shrine, Fukuoka Tower (the tallest seaside tower), and Hakata Ramen!

Hokkaido. Coastal (no bordering prefectures). Formerly an independent land of the Ainu people. Boasts a food self-sufficiency rate of about 200%, the highest by far. Suffering from significant population decline... (It's sad...) The population fell below 5 million in 2026. The extreme concentration in Sapporo is a major issue. Overwhelmingly the largest in area! It is also the birthplace of Nitori. Home to many famous foods like Jingisukan (mutton) and Sapporo Ramen (one of the Big 3 Ramens in Japan)! Has an incredible amount of nature and tourist spots! Includes Yubari, the city with the smallest population in Japan (only a few thousand people, despite being a "city").

Hiroshima Prefecture. Coastal. The central city of the Chugoku region! Home to many famous foods and places like Itsukushima Shrine, Hiroshima-style okonomiyaki, and Hiroshima oysters! Its rival is Miyagi! (In terms of population scale, etc.) The largest city is Hiroshima City! Contains Fuchu Town, the most populous town in Japan! (Population approx. 50,000; it has recently been considering transitioning to city status.)

Miyagi Prefecture. Coastal. The leader of Tohoku! Home to many famous places and foods like Okama (a circular crater lake and symbol of the Zao Mountain Range; also called "Five-Colored Lake" because the emerald green water changes color with the sunlight), beef tongue, Naruko Onsen (a world-renowned hot spring area with 7 of the 11 types of spring water found in Japan), Tashirojima (Cat Island, where cats outnumber people), sasa-kamaboko (bamboo leaf-shaped fish cake), and zunda-mochi! While Kanagawa has the major cities of Yokohama and Kawasaki, Miyagi has a Yokohama Town and a Kawasaki Town. (They didn't copy the names, they just happened to end up the same.)