Question: Port Island is an artificial island in a city in japan that is located on the southern side of the main island of Honshu, and is about 30 km from what city?

Context paragraphs:
Rokkō Island: Rokkō Island (六甲アイランド , Rokkō Airando ) is the second major artificial island in Higashinada-ku, Kobe, Japan located in the southeast region at Port of Kobe.  The island was constructed from reclaimed land between 1973 and 1992.  It has a 3.4 km by 2 km rectangular shape, and covers 5.80 km².  The island was one of the hardest hit areas in Kobe during the Great Hanshin earthquake.  Rokkō Island contains hotels, sports and conventions facilities, markets, a water amusement park, sea view apartment buildings, the Kobe Fashion Museum, two international schools, container yards, wharves, and port facilities.  The Rokko Liner connects the island to JR Sumiyoshi Station, stopping at several points along the way.

Port Island, Seychelles: Port Island (French: "Ile du Port" ) is an artificial island in Seychelles, lying 2 km from the capital Victoria.

Port Island: Port Island (ポートアイランド , Pōto Airando" ) is an artificial island in Chuo-ku, Kobe, Japan.  It was constructed between 1966 and 1981 at Port of Kobe, and officially opened with an exposition called "Portopia '81."  It now houses a heliport, numerous hotels, a large convention center, the UCC Coffee Museum, Japan's 3rd IKEA store, and several parks.

Jurong Island: Jurong Island is an artificial island located to the southwest of the main island of Singapore, off Jurong Industrial Estate.  It was formed from the amalgamation of seven offshore islands, the islands of Pulau Ayer Chawan, Pulau Ayer Merbau, Pulau Merlimau, Pulau Pesek, Pulau Pesek Kechil (also called Terumbu Pesek), Pulau Sakra (which was a previous merger of Pulau Sakra and Pulau Bakau), Pulau Seraya, Pulau Meskol, Pulau Mesemut Laut, Pulau Mesemut Darat and Anak Pulau.  This was done through Singapore's land reclamation efforts.  Land reclamation on Jurong Island was completed on September 24, 2009, 20 years earlier than scheduled.  Pulau Buaya was joined to Jurong Island via reclamation in 2010.  Jurong Island forms a land area of about 32 km² from an initial area of less than 10 km² , and is the largest of Singapore's outlying islands.

World Memorial Hall: World Memorial Hall (ワールド記念ホール , Wārudo Kinen Hōru ) or World Hall is a multi-purpose arena located in the Chūō-ku Ward of Kobe, Japan.  It has a maximum capacity of 8,000 people and is optimized for large-scale meetings, sport events, trade shows and concerts.  It is located on the artificial island of Port Island, along with numerous convention centers, hotels and universities.

Kansai International Airport: Kansai International Airport (関西国際空港 , Kansai Kokusai Kūkō ) (IATA: KIX, ICAO: RJBB) is an international airport located on an artificial island in the middle of Osaka Bay, 38 km southwest of Ōsaka Station, located within three municipalities, including Izumisano (north), Sennan (south), and Tajiri (central), in Osaka Prefecture, Japan.  The airport is off the Honshu shore and was designed by Italian architect Renzo Piano.  The airport serves as an international hub for All Nippon Airways, Japan Airlines, and Nippon Cargo Airlines, and also serves as a hub for Peach, the first international low-cost carrier in Japan.

Wakayama Marina City: Wakayama Marina City is a resort town built on an artificial island of 49 hectares (121 acres) in size, in Wakaura Bay, part of the larger Osaka Bay.  It is also part of Wakayama-shi (City) Wakayama-ken (Prefecture) on the Kansai Penninsula, about a forty-minute train ride south of the Kansai International Airport, which is itself built on an artificial island.  The nearest large city is Osaka, Japan, about an hour by train to the north.

Ordu–Giresun Airport: Ordu–Giresun Airport (IATA: OGU, ICAO: LTCB) (Turkish: "Ordu-Giresun Havalimanı" ) is an airport on an artificial island just off the coast of Gülyalı, a town in Ordu Province, Turkey and Piraziz, a town in Giresun Province, Turkey.  It is located 19 km away from Ordu and 25 km from Giresun city centres.  It is the third artificial island airport in the world.

Kobe: Kobe (神戸市 , Kōbe-shi , ]) is the sixth-largest city in Japan and is the capital city of Hyōgo Prefecture.  It is located on the southern side of the main island of Honshū, on the north shore of Osaka Bay and about 30 km west of Osaka.  With a population around 1.5 million, the city is part of the Keihanshin metropolitan area along with Osaka and Kyoto.

Honshu: Honshu or Honshiu (本州 , Honshū / Honsyū , "Main Island" or "Main Province") , ] , is the largest and most populous island of Japan, located south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Straits.  The island separates the Sea of Japan, which lies to its north and west, from the North Pacific Ocean to its south and east.  It is the seventh-largest island in the world, and the second-most populous after the Indonesian island of Java.

Supporting paragraphs: Port Island Kobe
Answer: Osaka