Saeko Oguma studied viola at the Tōhō Gakuen School in Tokyo. She subsequently gained orchestral experience playing in the Deutsches Symphonieorchester Berlin and in several leading orchestras in Japan, inclusing the Tokyo Symphony Orchestra and the Tokyo Opera Nomori Orchestra under the baton of Riccardo Muti. She performed chamber music in festivals throughout Japan.
She pursued her studies with Sven Arne Tepl, Marjolein Dispa and Nobuko Imai at the Conservatorium van Amsterdam.
Saeko Oguma was prize winner during the International Johannes Brahms Competition in 2008. Earlier, she had won the 2006 Tokyo music competition, the Nagoya international music competition and the 2002 competition of the Japan Classical Music Association.
After winning the Amsterdam National Viola Competition, she joined the Royal Concertgebouw Orchestra's viola section as assistant principal in September 2010.