Rottman gives its composition as the 7th Tank Regiment,4th Tank Regiment,1 Battalion/2nd Formosa Inf Regt and a Company of the 48th Engineers.Initially Sonoda commanded the 7th Tank Regiment.
From a 1943 Japanese Commerative Magazine on the Battle for the Philippines (published in both Japanese and English).
Colonel Sonoda was later killed in the Bataan fighting? Has anyone any further details on this officer?A war correspondent calls on Sonoda (Killed in action),Commanding Officer of a tank unit,in the vicinity of Orani..