Given the question: Information: - Fukushima - ku ( ) is one of 24 wards of Osaka city in Japan . The ward is primarily a residential quarter , but has some office buildings and a commercial district , as well as factories and wholesale businesses . In recent years , many high rise apartment buildings and office buildings have been built in this ward , because it is close to the Umeda and Djima business centres . As of 1 August 2008 , the ward has a population of 63,237 , and an area of 4.67 square km. It is bordered by the Yodo River on the north , and the Djima River on the south . - Although it is officially served by only the JR Kobe/Kyoto Lines (Tkaid Main Line) and the Osaka Loop Line, Osaka is the starting point of JR Takarazuka Line service, and serves as the terminal for trains bound for the San'in region via JR Takarazuka Line and the Hokuriku region via JR Kyoto Line, while offering connections to trains bound for Nara, Wakayama and Kansai International Airport via the Osaka Loop Line. - Japan ("Nippon" or "Nihon" ; formally "" or "Nihon-koku", means "State of Japan") is a sovereign island nation in Eastern Asia. Located in the Pacific Ocean, It is lying off the eastern coast of the Asia Mainland (east of China, Korea, Russia) and stretching from the Sea of Okhotsk in the north to the East China Sea and near Taiwan in the southwest. - Historically a merchant city, Osaka has also been known as the and served as a center for the rice trade during the Edo period. - Umeda Station is served by the following railways: The freight terminal of Japan Freight Railway Company (JR Freight) (Umeda Freight Branch of Tkaid Main Line), closed in 2013, was also called Umeda. - Umeda () is a major commercial and business district in Kita-ku, Osaka, Japan, and the city's main northern railway terminus (saka Station, Umeda Station). What is the relationship between 'fukushima-ku' and 'osaka'?
The answer is:
located in the administrative territorial entity