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Yūsei Matsui
Yusei Matsui is a Japanese manga artist. He was an assistant of Yoshio Sawai, the manga artist of Bobobo-bo Bo-bobo. He wrote and illustrated the manga series Neuro: Supernatural Detective, Assassination Classroom, and The Elusive Samurai.
Excerpt from Wikipedia, available under CC BY-SA 4.0.
Books

Assassination classroom
2014
ISBN 9781421576138