This is Palette Town where Venus Fort is located. This whole area including Venus Fort was due to be dismantled in 2010 because the lease for the land was up.
Back in 1990 after the bubble burst and economic depression set in, the government found it difficult to lease the land to anyone until they dropped the lease price of 1 square meter to about 840yen! The condition was that the land had to be returned 10 years later.
Mori Building and Sumitomo Bussan together leased the land at that price knowing that they would have to return it 10 years later and built Palette Town on it. But 10 years on, Palette Town turned out to be successful - but a contract is a contract and in 2010, the Tokyo governing body announced that Palettte Town was to be dismantled - the end result was that Mori Building and Toyota Motors teamed up and bought back the land.
Mori Building and Toyota have plans to build a convention hall and other facilities so the future for Venus Fort is uncertain - so if you are in town then you may want to pay a visit before its gone forever.