Hikawa Maru-class ocean liner

The Hikawa Maru-class ocean liner (氷川丸型貨客船) was a class of ocean liners of Japan, serving during the 1930s, and after World War II.

Background
In 1927-28, the NYK Line placed an order for eight ocean liners to reinforce the Japan–Seattle route (3 × Hikawa Maru class), Japan–San Francisco route (3 × Asama Maru class), and Japan–London route (2 × Terukuni Maru class). The Hikawa Maru class were named the Hikawa Maru, Hiye Maru (later Hie Maru) and Heian Maru.

Service
Hikawa Maru was completed on 25 April 1930. Her maiden voyage was 13 May 1930 for Yokohama–Seattle. Arrived at Seattle on 27 May. She sailed 73 times until August 1941. Her service was popular, and the cuisine was well-regarded, as NYK Line employed a chef trained in Europe.

Hie Maru was completed on 31 July 1930. Her maiden voyage was 23 August 1930 from Kobe.

Heian Maru was completed on 24 November 1930. Her maiden voyage was 18 December 1930 from Hong Kong.

All of them were enlisted by the Imperial Japanese Navy (IJN) in October–November 1941.

Service in World War II

 * Hikawa Maru was classified to auxiliary hospital ship on 1 December 1941, and she was assigned to the 4th Fleet.
 * Hie Maru was classified to auxiliary submarine tender on 15 February 1942, and she was assigned to the 6th Fleet.
 * Heian Maru was classified to auxiliary submarine tender on 15 October 1941, and she was assigned to the 6th Fleet.
 * 17 November 1943, Hie Maru was sunk by USN submarine.
 * 18 February 1944, Heian Maru was sunk by air raid at Chuuk.
 * 10 August 1946, Hikawa Maru survived war, and she was reverted to the NYK Line.