Gerald Warner was the American Consul in Kobe, Japan the day Pearl Harbour was bombed.
The war diary starts from 8 December 1941 in Kobe until 25-28 August 1942 after the repatriation ship, "Gripsholm" had docked in Jersey City, United States. The Asama Maru picked up internees from Hong Kong on 29 June 1942. Some familiar names from the American contingent in Hong Kong are mentioned during interactions with Warner on board the Asama Maru/Gripsholm.
An interesting read: https://www.adst.org/OH%20TOCs/Warner,%20Gerald.war%20diary.toc.pdf