[2] He has won two Olympic medals in the men's artistic team all-around – silver in 2012 (London) and gold in 2016 (Rio de Janeiro).

Kato together with Japanese teammates (Hiroki Ishikawa, Shogo Nonomura, Yusuke Tanaka, and Chihiro Yoshioka) competed at the 2013 Summer Universiade in Kazan where Team Japan won the bronze medal.

He won gold in Floor and bronze in Horizontal Bar final.

Kato competed at the 2013 World Championships along with Kōhei Uchimura, Kenzo Shirai, Koji Yamamuro, Kohei Kameyama, and Kazuhito Tanaka.

This biographical article related to Japanese artistic gymnastics is a stub.