Livedoor has its headquarters in the Sumitomo Fudosan Nishishinjuku Building [ja] (住友不動産西新宿ビル, Sumitomo Fudōsan Nishi-Shinjuku Biru).[1] H.I.S. has its headquarters in the Shinjuku Oak Tower.[2] Seiko Epson's Tokyo Office is in the Shinjuku NS Building.[3] Capcom's Tokyo offices are located in the Shinjuku Mitsui Building[4] and Keihin Corporation is headquartered in the Shinjuku Nomura Building.[5] Taisei Corporation also has its headquarters in the district.[6]