Born in Saitama, Japan, in 1982, Toshiki Eri began playing the piano at the age of six. He studied the piano with Haruko Uehara, Haruko Ueda, and others. He graduated from the University of Tokyo and became a doctor in 2006. At the same time, he pursued his career as an amateur pianist, giving numerous concerts as a soloist and chamber music pianist. He has also performed numerous piano concertos composed by Bach, Mozart, Beethoven, Chopin, Tchaikovsky, and Rachmaninoff, with amateur orchestras in Japan. In 2014, he took part in the Ika-r international music camp in Hakodate. Since 2016, he has been doing a series of project in Tokyo playing piano with the reading of poems by Shuntaro Tanikawa, with composer Takuya Nemoto, and actress Ayaka Kanematsu. Since 2018, he has been based in Paris, studying immunology at the Institut Pasteur and giving chamber music concerts. Since 2021, he has been performing as part of Trio Myrte with violinist Reiko Kitahama and cellist Christophe Beau, and they completed a concert tour of Japan in autumn 2022. He was awarded the Special Prize Amateurs Virtuoses at the 2023 Ile de France International Piano Competition in 2023.