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.

Yokohama is the second largest city in Japan by population, and most populous municipality of Japan. It is the capital city of Kanagawa Prefecture. It lies on Tokyo Bay, south of Tokyo, in the Kantō region of the main island of Honshu. It is a major commercial hub of the Greater Tokyo Area. It’s also known for Sankei-en Garden, a botanical park containing preserved Japanese residences from different eras, and the seaside Minato Mirai district, site of the 296m Landmark Tower.   Yokohama's population of 3.7 million makes it Japan's largest city after the Special Wards of Tokyo. Yokohama developed rapidly as Japan's prominent port city following the end of Japan's relative isolation in the mid-19th century, and is today one of its major ports along with Kobe, Osaka, Nagoya, Hakata, Tokyo, and Chiba.

Nagasaki Prefecture (長崎県 Nagasaki-ken) is a prefecture of Japan located on the island of Kyushu. The prefectural capital is Nagasaki City. Nagasaki has become synonymous with the atomic bomb that levelled the city in August 1945, but this fascinating city offers wonderful temples, great food, top museums and a fascinating, if at times tragic, history.