at the mitsubishi yokohama shipyard, "isuzu" was repaired and modified with the installation of a type 21 air-search radar. the no. 7 14 cm/50 3rd year type naval gun was replaced by an unshielded twin 12.7 cm/40 type 89 naval gunmount. the no. 5 gun was removed. two triple 25-mm mounts were added bringing the light aa suite to ten 25-mm aa mounts and one quadruple type 93 13.2 mm machine gun in front of bridge.