[2] Shigaki had a range of different coaching jobs in England, while studying Football Science at Liverpool John Moores University.
[2] In 2006, Shigaki moved back to Japan, initially working as an interpreter at Nagoya Grampus, and in 2007 he also became a coach at the club.
Between 2008 and 2016, Shigaki worked as a coach for a number of clubs, including Avispa Fukuoka, Oita Trinita, JEF United Chiba, Gainare Tottori[3] and Júbilo Iwata.
[9] Unable to help Tottori gain promotion to the J2 League, Shigaki left his role at the end of the 2020 season.
[11] In 2022, he was named as a coach at Thai club BG Pathum United, until midway through the season, he was appointed as the successor of Masahiro Kuzuno at Vanraure Hachinohe, Shigaki's first managerial role.