The Osaka Prefectural Government Sakishima Building (大阪府咲洲庁舎, Ōsaka fu Sakishima chōsha), or Cosmo Tower (コスモタワー, Kosumo Tawā), is the second tallest building in Osaka, and the third-tallest building in Japan. The former name is 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, Ōsaka Wārudo Torēdo Sentā Birudingu), or WTC Cosmo Tower (WTCコスモタワー, Daburyūtīshī Kosumo Tawā) until June, 2010. It is the same height as the Rinku Gate Tower Building in Rinku Town, located in Nanko Cosmo Square near the Osaka harbor, Suminoe-ku, Osaka.
The 55-story building rises 256 m (840 ft) and is topped by a skylobby. It contains three basement floors, a museum, restaurants, observation deck, office space and a conference room. The observation deck is in an inverted pyramid at the top of the structure. A transparent elevator can take passengers from ground level to the top in just 80 seconds.
The building houses trade offices for companies around the world.
It was built in 1995.(Wikipedia)