Born in Japan, at the age of three Tomono started her piano studies at the Yamaha Music School. She made her orchestral debut as a soloist at fifteen. While she was in Japan, Tomono won a number of competitions, consequently she was invited to perform at gala concerts in major Tokyo venues such as the Casals Hall and Orchard Hall, she was also invited to perform at a concert tour in Israel. Many of her performances were broadcast on television.

Later, Tomono was awarded a scholarship by the Yamaha Music Foundation to study at the Royal Academy of Music in London whereshe studied with Christopher Elton and the late Maria Curcio, one of the most distinguished pupils of Artur Schnabel. Tomono performed several times with orchestras including Mozart Concerto K505 directed by today's one of the most celebrated artists, Trevor Pinnock who selected her to be the soloist. After winning several prizes including the Douglas Cameron Prize, Greta G. M. Parkinson Prize, Leslie England Award, Andrew Sykes Award and Kenneth Sidney Brindle Award and number of different scholarships, she gained a BMus degree with First Class Honours. She has performed around the UK in such venues as the Snape Maltings, Aldeburgh, St. Martin in the Fields and the Wigmore Hall, London.

Tomono has appeared as a soloist internationally and captivated audiences around the world. Alongside her successful solo recitals worldwide. Her recent performances include Beethoven's 4thpiano concerto, Mozart Piano Concerto K491 as a soloist in Draper’s Hall, London as well as in Guatemala City, Guatemala.