He later served in various capacities aboard the battleship Nagato, destroyers Nire and Hokaze, and cruisers Izumo, Kako and Jintsu.

Appointed chief of staff of the First Task Force, Komura took part in the Battle of the Philippine Sea in June 1944.

On 6 April 1945, Komura received orders for Operation Ten-Go, to attack the American invasion force on Okinawa.

Yahagi was ordered to accompany battleship Yamato from Tokushima for its final suicide mission against the American fleet.

Recalled to Japan in May, Komura was stationed in Tokyo Bay as commanding officer of Yokosuka Naval District until 30 November 1945.