USS Sea Owl (SS/AGSS-405), a Balao-class submarine, was a ship of the United States Navy named for the sea owl, a lumpfish of the North Atlantic Ocean.
The Japan Maritime Self-Defense Force, abbreviated JMSDF, also simply known as the Japanese Navy, is the maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese Navy (IJN) after World War II. The JMSDF has a fleet of 154 ships, 346 aircraft and 50,800 personnel.
The 6th Fleet was a fleet of the Imperial Japanese Navy (IJN) that during World War II, had primary responsibility for the command of submarine operations.
Ro-34 was a Kaichū type submarine of the K6 sub-class built for the Imperial Japanese Navy. Completed and commissioned in May 1937, she served in World War II, operating in the South China Sea and the Netherlands East Indies, off New Guinea, and in the Solomon Islands. She was sunk in April 1943 during her eleventh war patrol.
The 8th Submarine Squadron of the Imperial Japanese Navy was based at Swettenham Pier, Penang, Malaya, until late 1944 during World War II. Its mission was to disrupt Allied supply lines in aid of Nazi Germany.
Ro-61, originally named Submarine No. 72, was an Imperial Japanese Navy Type L submarine of the L4 subclass. She was in commission at various times from 1923 to 1934, and was recommissioned in 1940. Before World War II, she served in the waters of Japan. During World War II, she took part in the Battle of Wake Island and the Aleutian Islands campaign, conducting the first attack on an enemy ship ever carried out by a Japanese Ro-type submarine. She was sunk in August 1942.
Ro-65 was an Imperial Japanese Navy Type L submarine of the L4 subclass. First commissioned in 1926, she served in the waters of Japan prior to World War II. During World War II, she operated in the Central Pacific, supported Japanese forces in the Battle of Wake Island and invasion of Rabaul, and took part in the Aleutian Islands campaign. She sank in a diving accident in November 1942.
Ro-68 was an Imperial Japanese Navy Type L submarine of the L4 subclass. First commissioned in 1925, she served in the waters of Japan prior to World War II. During World War II, she supported Japanese forces during the Battle of Wake Island and the invasion of Rabaul and took part in the Aleutian Islands campaign. She served as a training submarine from late 1942 to late 1944 before returning to a combat role in Japanese waters late in the war. She surrendered to the Allies in 1945 at the conclusion of the war and was scuttled in 1946.
Ro-64, originally named Submarine No. 79, was an Imperial Japanese Navy Type L submarine of the L4 subclass. First commissioned in 1925, she served in the waters of Japan and Chōsen prior to World War II. During World War II, she operated in the Central Pacific, supported the Japanese invasion of Rabaul, and took part in the Aleutian Islands campaign, then in late 1942 was relegated to a role as a training ship. She was sunk in April 1945.
Ro-63, originally named Submarine No. 84, was an Imperial Japanese Navy Type L submarine of the L4 subclass. First commissioned in 1924, she served in the waters of Japan prior to World War II. During World War II, she operated in the Central Pacific and took part in the Aleutian Islands campaign, then in late 1942 was relegated to a role as a training ship and tender for midget submarines. After the war ended in 1945, she surrendered to the Allies, who scuttled her in 1946.
Ro-62, originally named Submarine No. 73, was an Imperial Japanese Navy Type L submarine of the L4 subclass. She was in commission at various times from 1923 to 1934, and was recommissioned in 1938. Before World War II, she served in the waters of Japan. During World War II, she took part in the Battle of Wake Island and the Aleutian Islands campaign, then was relegated to a training role in late 1942. After the war ended in 1945, she surrendered to the Allies. She was scuttled in 1946.
I-44 was an Imperial Japanese Navy Type B2 submarine. Completed and commissioned in January 1944, she served in the late stages of World War II, she conducted war patrols in the Pacific Ocean as a conventional submarine before she was converted into a kaiten suicide attack torpedo carrier. She then conducted kaiten operations during the Battle of Iwo Jima and the Battle of Okinawa before she was sunk in April 1945.
I-372 was an Imperial Japanese Navy Type D1 transport submarine. Completed and commissioned in November 1944, she served in World War II and was sunk in July 1945.
Ro-36 was an Imperial Japanese Navy Kaichū type submarine of the K6 sub-class. Completed and commissioned in May 1943, she served in World War II, conducting four war patrols in the Pacific Ocean before she was sunk in June 1944.
Ro-42 was an Imperial Japanese Navy Kaichū type submarine of the K6 sub-class. Completed and commissioned in August 1943, she served in World War II and was sunk in June 1944 during her third war patrol.
Ro-43 was an Imperial Japanese Navy Kaichū type submarine of the K6 sub-class. Completed and commissioned in December 1943, she served in World War II and was sunk in February 1945 during her fifth war patrol.
Ro-44 was an Imperial Japanese Navy Kaichū type submarine of the K6 sub-class. Completed and commissioned in September 1943, she served in the central Pacific Ocean during World War II and was sunk in June 1944 during her second war patrol.
Ro-49 was an Imperial Japanese Navy Kaichū type submarine of the K6 sub-class. Completed and commissioned in May 1944, she served in World War II and patrolled off the Philippines and the Ryukyu Islands. She was lost during her third war patrol sometime in late March or April 1945.
Ro-100 was an Imperial Japanese Navy Ro-100-class submarine. Completed and commissioned in September 1942, she served in World War II, operating in the Solomon Islands, Rabaul, and New Guinea areas. She sank in November 1943 when she struck a mine during her seventh war patrol.
Ro-113 was an Imperial Japanese Navy Ro-100-class submarine. Completed and commissioned in October 1943, she served in World War II, operating off the Admiralty Islands, in the Indian Ocean — where she sank the last Allied ship torpedoed by a Japanese submarine during World War II — and off the Philippine Islands. She was sunk in February 1945.
