The design of the hall and acoustics evolved together, as Gehry designed the Hall from the inside out. Dr. Minoru Nagata was selected as the acoustician because of the bright and clear, yet warm, sound of Tokyo’s acclaimed Suntory Hall. He and his assistant, Yasuhisa Toyota (who became chief Concert Hall acoustician upon Nagata’s retirement in 1994), worked with Gehry by fax machine and traveled to Los Angeles monthly.