On 5 May, "Kikuzuki" slid off of the shore of Gavutu and sank in Tulagi harbor, a total loss (). "Tama Maru" foundered two days later. The other surviving, damaged Japanese ships were able to reach Rabaul and Kavieng for repairs. "Hagoromo Maru" and "Noshiro Maru #2" joined the Port Moresby Invasion Group. On 10 May, as "Okinoshima" participated in the first Japanese attempt to take Ocean (Banaba) and Nauru Islands, titled Operation RY, she was sunk by the submarine off New Ireland (). A total of 87 Japanese naval personnel died in the 4 May air attacks on Tulagi, and 36 of the landing troops were seriously injured.