Kammala jumla mai zuwa: Tomioka ya koma Babban Jami'in Sojojin Ruwa a matsayin shugaban Ofishin Ayyuka na sashen a watan Disamba na 1944, kuma ya riƙe wannan matsayi har zuwa ƙarshen yakin. Ya kasance daya daga cikin wakilan jami'ai na Babban Jami'in Rundunar Sojan Ruwa na Imperial Japan a
Bikin mika wuya na Jafananci a kan.