Nikken Sekkei
is a concert hall in Sumida, Tokyo, Japan. It opened in 1997 and has two auditoria; the main hall, with 1,801 seats; and the small hall, with 252 seats. It is the home of the New Japan Philharmonic. Nikken Sekkei were the architects, with acoustical design by Nagata Acoustics, who tested their concept with a 1:10 model.