Sounds like it was the Oryoku Maru: >Oryoku Maru was a 7,363-ton passenger cargo liner transporting 1,620 survivors of the Bataan Death March, Corregidor, and other battles, mostly American, packed in the holds, and 1,900 Japanese civilians and military personnel in the cabins. She left Manila on 13 December 1944, and over the next two days was bombed and strafed by U.S. airplanes. As she neared the naval base at Olongapo in Subic Bay, U.S. Navy planes from USS Hornet attacked the unmarked ship, causing it to sink on December 15. About 270 died aboard the ship. Some died from suffocation or dehydration. Others were killed in the attack, drowned or were shot while escaping the ship as it sank in Subic Bay, where the 'Hell Ship Memorial' is located.

>...On January 6, the smaller group of prisoners was transferred from Brazil Maru to Enoura Maru, and 37 British and Dutch were taken ashore. However, on January 9, Enoura Maru was bombed and disabled while in harbor, killing about 350 men. The survivors were put aboard Brazil Maru which arrived in Moji, Japan, on January 29, 1945. Only 550 of the over 900 who sailed from Taiwan were still alive; 150 more men died in Japan, Taiwan, and Korea in the following months, leaving only 403 survivors of the original 1,620 to be liberated from camps in Kyushu, Korea, Manchuria, and Taiwan in August and September 1945.

That's what the quote in my original comment was about. Fucking horrific