Fukuoka is the capital city of Fukuoka Prefecture and is situated on the northern shore of the island of Kyūshū in Japan. Voted number 14 in 2010's poll of the World's Most Livable Cities, Fukuoka is praised for its green spaces in a metropolitan setting. It is the most populous city in Kyūshū, followed by Kitakyūshū. It is the largest city and metropolitan area west of Keihanshin. It’s known for ancient temples, beaches and modern shopping malls, including Canal City. Maizuru Park contains ruins of 17th-century Fukuoka Castle.

Kagoshima, a seaside city on Japan's Kyushu Island, is the capital of Kagoshima Prefecture. It has been nicknamed the "Naples of the Eastern world" for its bay location (Aira Caldera), hot climate and impressive stratovolcano, Sakurajima. It is a historical city watched over by the looming bulk of Sakurajima (桜島), an active volcano that regularly dumps ash over the city and erupts a bit every now and then to remind people it's still there. The home of near-mythical samurai hero Saigo Takamori, it's full of sites related to the Satsuma Rebellion.

Busan is South Korea's second largest metropolis after Seoul, with a population of around 3.6 million. It is the largest port city in South Korea and the fifth largest port in the world. The city is located on the southeasternmost tip of the Korean peninsula and faces the Korea Strait. The most densely built up areas of the city are situated in a number of narrow valleys between the Nakdong River and Suyeong River, with mountains separating some of the districts. Nampodong to the south is Busan's shopping and entertainment downtown, while central Seomyeon at the intersection of subway lines 1 and 2 is the main office building area. Between them are Busan's train station and its international ferry terminals. The beaches of Gwangalli, Haeundae and Songjeong lie to the east, the ruins of mountain fortress Geumjeong guard the north. To the west is Gimhae town where the Busan Airport is located.

Tokyo - officially Tokyo Metropolis, is one of the 47 prefectures of Japan. It is located on the eastern side of the main island Honshū and includes the Izu Islands and Ogasawara Islands. It is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family. The city is famed for its vibrant food scene, and its Shibuya and Harajuku districts are the heart of its trendy teen fashion scene.

Hiroshima is the capital of Hiroshima Prefecture, and the largest city in the Chūgoku region of western Honshū, the largest island of Japan. It became best known as the first city in history to be destroyed by a nuclear weapon when the United States Army Air Forces (USAAF) dropped an atomic bomb on it at 8:15 A.M. on August 6, 1945, near the end of World War ll. Although many only know it for the horrific split when it became the site of the world's first atomic bomb attack, it is now a modern cosmopolitan city with excellent cuisine and a bustling nightlife.