Kawamoto changed her instrument to viola when she joined the Tokyo Metropolitan Symphony Orchestra in 1991. She served as the principal viola player from 1999 until she left the orchestra in 2002.
She has participated in numerous renowned music festivals such as Marlboro (U.S.A.), Davos (Switzerland), Tokyo Summer Festival, and Kirishima. She has been regularly invited to Saito Kinen Orchestra, Ozawa Ongaku Juku, Mito Chamber Orchestra, and Marth Argerich Festival. Her performances with noted soloists such as Martha Argerich and Yuri Bashmet were highly acclaimed.
Kawamoto is also active as soloist and performed recitals at Nippon Steel Concert in November 1995 and at the 59th Promising Artists Series. Her recital series named “Haseko Classic Special / Yoshiko Kawamoto, the violist” which was held at Casals Hall, Tokyo for a year received acclaim both from public and critics. Kawamoto has performed as soloist under the baton of noted conductors such as Gary Bertini, Jean Fournet, and Peter Maag.
She was also invited to play at “Seven Stars Gala Concert” which was organized and performed by Mo. Myung-Whun Chung (conductor and pianist), and performed chamber concerts with the Maestro both in Korea and Japan. Her performance in July 2003 was reviewed in Asahi Newspaper, “Amazing flexibility. True viola virtuoso who can support other parts playing together with them”.
Two CDs have been released from Maister Music label (“Viola Baroque Music / MM-1028”with Shinichiro Nakano (cembalo) and “J.S. Bach: Sonata for Viola da gamba and violoncello / MM-1075”).
She is a lecturer at the string department of the Tokyo National University of Fine Arts and Music.