Born in Matsuyama City, Japan. He started his musical training on the piano and also the guitar. In Tokyo he played the acoustic and electric guitar in professional Jazz bands and the Swing Journal magazine described him as “one of the most remarkable young Jazz musicians.”
In 1997, Mr. Kosako moved to the United States and soon after he started playing the harp. He is primarily self- taught with a few lessons to learn fundamental harp technique. He was the principal harpist of Stockton Symphony Orchestra in California between 2005-2010 and the featuring soloist for 2009-2010 season.
His latest music innovation is improvisation and composition for the harp. In 2007 he won the second place in Lyon & Healy International Jazz & Pop Harp Competition and received the “Best of Sacramento” award from Sacramento Magazine as “Best Jazz Hound in Tie and Tail”. Sacramento Magazine says, “Kosako plays with fluid, modern style that evokes Keith Jarrett and Chick Corea.” His groundbreaking style is also noted in Harp Column as “Motoshi Kosako, a Japanese native whose introspective soloing was reminiscent of Keith Jarrett.” He plays numerous original compositions and standards as solo or in trio and quartet. Since 2008 he started touring Japan to give performances and various workshops and he is considered as the most influential Jazz harpist in Japan.
In 2002 and 2003, he recorded two classical harp albums, “Celestial Harp I” and “Celestial Harp II”. In April 2008, he has released his first Jazz Album, “Naked Wonder” with his trio, Bill Douglass (bass, bamboo flute) and Daryl Van Druff (drums). In 2010 he has released his solo album “Living harp” in Japan and produced new album “ Place in the heart” with Grammy ward winning musician, Paul McCandless (oboe, English horn, soprano sax, bass clarinet) and made their record debut in Japan distributed by KING RECORDS INTERNATIONAL. He is invited to perform at VIII Rio Harp Festival in Rio de Janeiro, brazil, American Harp Society National Conference 2014 in New Orleans and World Harp Congress, Sydney 2014.
In 2008, he joined NPO holistic health research group in Japan (Total Health Research Group) and began conducting research projects involving sound healing and practical application of music to occupational fields for the promotion of health. In 2012 the public medicine professional journal, “Science of Public health” in Japan published his research article “Total Health and Music”. He holds a B.S of health science and nursing, and is a registered nurse and public health nurse.