Osaka Prefectural Government Sakishima Building

The Osaka Prefectural Government Sakishima Building (大阪府咲洲庁舎) or Cosmo Tower (コスモタワー) is the second tallest building in Osaka and the third tallest building in Japan. Until 2010, it was known as Osaka World Trade Center Building (大阪ワールドトレードセンタービルディング) or WTC Cosmo Tower (WTCコスモタワー). It is located in Nanko Cosmo Square, near the Osaka harbor, in Suminoe-ku.

The skyscraper rises 256 m, the same height as the Rinku Gate Tower Building in Izumisano. It contains three basement floors, a museum, restaurants, office space, a conference room, a skylobby and an observation deck, which is located in an inverted pyramid at the top of the structure. The building houses the working office for the governor of Osaka Prefecture.