She is an active recitalist and teaches piano performance, piano pedagogy and keyboard skills. Originally from Tokyo, Japan, Oshima-Ryan has performed in Tokyo (Sumida Triphony Hall), Kyoto (Kyoto International Conference Hall), Toronto, San Juan, Boston (New England Conservatory), and has presented world premieres of new works by Japanese composers. Her compact disc, From Afar, features solo piano works by contemporary Japanese composers. She has received a number of awards including first prize at the Wurlitzer Collegiate Artist Competition and second prize at the International Beethoven Piano Sonata Competition. After graduating Toho Academy in Tokyo, she earned a Doctor of Musical Arts degree at the College Conservatory of Music, University of Cincinnati.