Kei Kobayashi is a Japanese jazz pianist and composer who has been active since the early 2000s. He is known for his elegant and sophisticated playing style, which draws inspiration from both classical and jazz traditions. Kobayashi has released several critically acclaimed albums, including "The Standards" and "Just Sing," and has performed with a wide range of artists, including Benny Golson, Wynton Marsalis, and Diana Krall.