After retirement, Sakuma became coach at NTT Kanto (later Omiya Ardija) in 1991.
In August 2007, manager Robert Verbeek was sacked for poor performance when Ardija was at the 16th place of 18 clubs.
He managed until end of the season and Ardija finished at 15th place and remaining in J1 League.
In August 2011, manager Toshiya Miura was sacked for poor performance.
[1] This biographical article related to a Japanese association football defender born in the 1960s is a stub.