After dreaming of becoming a chef since childhood, Keisuke Matsushima graduated from culinary school and trained in kitchens across France. In 2002, he opened Kei’s Passion in Nice at the age of 25. His superior cuisine earned him a Michelin Star in 2008, making him the youngest non-French chef in France to do so. The restaurant was later expanded and is now known as KEISUKE MATSUSHIMA.

In 2009, he opened a Tokyo branch, which operated until 2020. In 2010, Matsushima received the L'Ordre des Arts et des Lettres as its youngest recipient and was named a Sake Samurai by the JSS. In addition to serving as owner-chef, he hosts cooking classes and gives talks to promote understanding of good food and eating.

He recently co-authored Umami: le goût de l'harmonie et du lien in 2024.