After retiring players career, Otsuki became
J.League club coach. (
Mito HollyHock (2000-2002),
Omiya Ardija (2003),
Urawa Reds (2004-2010) and
Vegalta Sendai (2011)) In 2012, he returned
Urawa Reds. On April 2, 2018, team manager
Takafumi Hori was sacked. Otsuki became manager. On April 22, the club contracted with
Oswaldo de Oliveira. So, Otsuki became assistant coach. In May 2019, manager Oliveira was sacked and Otsuki became a manager again. On 16 December 2021, Otsuki announcement officially appointment manager of Thespakusatsu Gunma (now
Thespa Gunma) from 2022 season. Following a poor start to the 2024 season with 10 losses in their first 14 games, Otsuki was dismissed in May 2024. ==Managerial statistics==