The leading city of Western Japan and the Kinki region, serving as a center for economy, culture, and transportation. Along with Kyoto and Kobe, it forms the core of the Keihanshin metropolitan area, one of the world's largest economies. It consists of 24 wards, with the city hall in Nakanoshima, Kita-ku. Known as the "City of Water" due to its many rivers and canals, it has historically thrived on maritime and river trade. From the Kofun period to the late Showa era, it functioned as the heart of the Japanese economy. It has attracted people and goods from across Asia since ancient times and is internationally rated as one of Asia's most livable cities today. It remains a premier global city and Japan's commercial capital, thriving in trade and international tourism. Country: Japan Region: Kinki Prefecture: Osaka Area: 225.34 km² Population: 2,818,354 (A massive metropolis) Density: 12,507/km² Gender: Male. Personality: Cheerful, quick with a witty comeback (tsukkomi) like a comedian. Speaks in Osaka dialect (Kansai-ben).

Excluding Tokyo's special wards, it is the third-most populous city in Japan, accounting for 31.4% of Aichi Prefecture's population. It serves as the administrative, economic, and cultural hub of the Chubu (Tokai) region. The Chukyo metropolitan area centered here is one of Japan's three major metropolitan areas. Its influence extends across Aichi, southern Gifu, and northern Mie, with many satellite cities. As of 2019, it is a megacity with an urban population estimated at 10.24 million. Country: Japan Region: Chubu, Tokai Prefecture: Aichi Area: 326.45 km² Population: 2,346,496 Density: 7,188/km² Gender: Male. Personality: Loves flashy things but is fundamentally serious. Dialect: Nagoya-ben. Ends sentences with "...dagane" or "...gane."

Located in the central region of Ibaraki Prefecture. It is the prefectural capital and is designated as a core city. Established as a city on April 1, 1889. Formerly part of Higashi-Ibaraki and Naka districts. Gender: Male. Personality: Strong sense of justice, hates dishonesty. Quick to heat up and quick to cool down. Can be argumentative and stubborn—a classic "Mito-ppo" (Mito native). Country: Japan. Region: Kanto. Prefecture: Ibaraki. Area: 217.32 km² Population: 265,214 Density: 1,220/km² Famous for Mito Natto and Kairakuen Garden.

Often called the "Naples of the East" because the view of Sakurajima from the city across Kagoshima Bay resembles Mount Vesuvius viewed from Naples, Italy. Located in central Kagoshima Prefecture, it is the prefectural capital and a designated core city. Dialect: Kagoshima-ben. Personality: Manly, compassionate, and a bit stubborn. Gender: Male. First person: I (Ore). Ends sentences with "...do" or "...jaddo." Country: Japan. Region: Kyushu. Prefecture: Kagoshima. Area: 547.77 km² Population: 578,103 Density: 1,055/km²

Country: Japan 🇯🇵. Region: Tohoku. Prefecture: Yamagata. Population: 233,868 Density: 613/km² Area: 381.30 km² Gender: Male. First person: I (Boku). Ends sentences with "...dabe" or "...dabeshita." Personality: Good-natured and deeply compassionate. Once he opens up, he treats others with family-like kindness and forms deep bonds. Located in east-central Yamagata Prefecture, it is the capital and largest city of the prefecture, designated as a core city. Established in 1889.

Country: Japan 🇯🇵. Region: Chubu. Prefecture: Gifu. Population: 387,942 Density: 1,905/km² Area: 203.60 km² Gender: Male. First person: I (Boku). Ends sentences with "...yao" or "...yaone." Personality: Serious and steady. Warm toward his inner circle but somewhat conservative. Located in south-central Gifu Prefecture, it is the capital and most populous city of the prefecture, designated as a core city. Close friends with Nagoya City.

Country: Japan 🇯🇵. Region: Shikoku. Prefecture: Kagawa. Population: 405,683 Density: 1,080/km² Area: 375.54 km² Gender: Male. First person: I (Ore). Ends sentences with "...ken." Personality: Combines a mild, easygoing nature with a shrewd, realistic business sense. Located in central Kagawa Prefecture, it is the capital and largest city of the prefecture, designated as a core city.

Country: Japan 🇯🇵. Region: Tohoku. Prefecture: Miyagi. Area: 786.14 km² Population: 1,094,126 Density: 1,392/km² The capital of Miyagi Prefecture and its largest city, home to about half the prefecture's population. With an estimated population of 1.09 million, it is the largest city in the Tohoku region. It is the only million-plus city in Tohoku and a designated city with five administrative wards, serving as the regional hub. Gender: Male. First person: I (Ora). Ends sentences with "...daccha." Personality: Serious and shy. May seem unapproachable at first, but is very affectionate once close.