# Japanese submarine Ha-105

Ha-105 was an Imperial Japanese Navy Ha-101-class submarine. Completed and commissioned in February 1945, she served during the final months of World War II, conducting a supply run and operating on radar picket duty. She surrendered at the end of the war in September 1945 and was scuttled in April 1946.

## Design and description

The Ha-101-class submarines were designed as small, cheap transport submarines to resupply isolated island garrisons. They displaced 436 metric tons (429 long tons) surfaced and 501 metric tons (493 long tons) submerged. The submarines were 44.5 meters (146 ft 0 in) long, had a beam of 6.1 meters (20 ft 0 in) and a draft of 4.04 meters (13 ft 3 in). They were designed to carry 60 metric tons (59 long tons) of cargo.
For surface running, the boats were powered by a single 400-brake-horsepower (298 kW) diesel engine that drove one propeller shaft. When submerged the propeller was driven by a 140-horsepower (104 kW) electric motor. They could reach 10 knots (19 km/h; 12 mph) on the surface and 5 knots (9.3 km/h; 5.8 mph) underwater. On the surface, the Ha-101s had a range of 3,000 nautical miles (5,600 km; 3,500 mi) at 10 knots (19 km/h; 12 mph); submerged, they had a range of 46 nmi (85 km; 53 mi) at 2.3 knots (4.3 km/h; 2.6 mph). The boats were armed a single mount for a 25 mm (1 in) Type 96 anti-aircraft gun.

## Construction and commissioning

Ha-105 was laid down on 29 June 1944 by Mitsubishi at Kobe, Japan, as Small Supply Submarine No. 4605. She was launched on 31 October 1944 and was named Ha-105 that day. She was completed and commissioned on 19 February 1945.

## Service history

Upon commissioning, Ha-105 was attached to the Kure Naval District and assigned to Submarine Squadron 11 for workups. On 17 April 1945, she was reassigned to Submarine Division 16 for supply operations. On 25 May 1945, however, she was reassigned again, to Submarine Unit No. 1, and she departed Kure, Japan, that day to operate south of Honshu on radar picket duty prior to a major kamikaze attack against Allied ships off Japan. She returned to Kure in mid-June 1945.
Ha-105 got underway from Kure on 4 July 1945 for her first and only supply run, bound for Amami Ōshima in the Amami Islands between Kyushu and Okinawa. Arriving there on 10 July 1945, she unloaded her cargo and quickly departed on her return voyage. She reached Kure in mid-July 1945 and began a conversion that would allow her to carry aviation gasoline.
Hostilities between Japan and the Allies ended on 15 August 1945, and on 2 September 1945, Ha-105 surrendered to the Allies at Kure. On 2 November 1945, she was reassigned to Japanese Submarine Division Two under United States Navy command along with her sister ships Ha-103, Ha-106, Ha-107, Ha-108, Ha-109, and Ha-111. In November 1945, the U.S. Navy ordered all Japanese submarines at Kure, including Ha-105, to move to Sasebo, Japan.

## Disposal

The Japanese struck Ha-105 from the Navy list on 30 November 1945. She was among a number of Japanese submarines the U.S. Navy scuttled off the Goto Islands near Sasebo in Operation Road's End on 1 April 1946, sinking at 32°37′N 129°17′E﻿ / ﻿32.617°N 129.283°E﻿ / 32.617; 129.283﻿ (Ha-105).