after convoy hi-71 reformed in san fernando, it arrived in manila on 21 august. "awa maru" was towed into manila the same day, and "noshiro maru" reached manila on 24 august. "sado", "matsuwa" and "hiburi" were intercepted by and as they attempted to rejoin their convoy in manila. "matsuwa" and "hiburi" were torpedoed by "harder" at 0456, and "sado" was torpedoed by "haddo" at 0524 while attempting to aid the stricken sister "kaibōkan". additional torpedoes were required to sink the three "kaibōkan". "haddo" sank "sado" with a three torpedo salvo at 0720, while "harder" sank "matsuwa" at 0649 and "hiburi" at 0755.