Background

• At first, she was built as a cargo ship for the Makō Minor Naval Station
  Mako Guard District
  The was the major navy base for the Imperial Japanese Navy in Taiwan before and during World War II. Located in at Mako ), , the Mako Guard District was responsible for control of the strategic Straits of Taiwan and for patrols along the Taiwan and China coastlines and in the South China Sea...
  
  . The IJN changed her into a submarine tender to support their submarines, because at the time the IJN only had one submarine tender, the Karasaki.
• After 1924, her duties were changed to surveying, because the Jingei class
  Jingei class submarine tender
  The was a class of submarine tenders of the Imperial Japanese Navy , and served from the 1920s through World War II. Two vessels of this class were built between 1922 and 1924 under the Eight-eight fleet plan.-Background:...
  
   were completed.
• She remained a submarine tender till the end of her service. Her bow Imperial Seal
  Imperial Seal of Japan
  The Imperial Seal of Japan is a mon or crest used by members of the Japanese Imperial family. Under the Meiji Constitution, no one was permitted to use the Imperial Seal except the Emperor of Japan, who used a 16 petal chrysanthemum with sixteen tips of another row of petals showing behind the...
  
   was never torn off.

Service

• 7 October 1912: Laid down as the .
• 21 May 1913: Launched.
• 20 January 1914: Completed, and she was assigned to the Sasebo Naval District
  Sasebo Naval District
  was the third of five main administrative districts of the pre-war Imperial Japanese Navy. Its territory included the western and southern coastline of Kyūshū, the Ryukyu Islands, Taiwan and Korea, as well as patrols in the East China Sea and the Pacific...
  
  .
• 23 May 1914: Classified to .
• 16 August 1914: Classified to , and renamed Komahashi. She assigned to the 4th Torpedo Division.
• 1 April 1920: Classified to .
• 1 December 1924: Classified to .
• (after): She surveyed at China coast.
• 1 October 1931: She was assigned to the Yokosuka Naval District
  Yokosuka Naval District
  was the first of four main administrative districts of the pre-war Imperial Japanese Navy. Its territory included Tokyo Bay and the Pacific coasts of central and northern Honshū from the Kii Peninsula to Shimokita Peninsula.-History:...
  
  .
• 15 April 1932: Reconstructions were started. She equipped genuine survey ship facilities. Changed all machineries also.
• November 1932: Reconstructions were ended.
• (after): She surveyed at Luzon Strait
  Luzon Strait
  The Luzon Strait is the strait between the island country of Taiwan and Luzon island of the Philippines. The strait thereby connects the Philippine Sea to the South China Sea in the western Pacific Ocean....
  
  , South Pacific Mandate
  South Pacific Mandate
  The was the Japanese League of Nations mandate consisting of several groups of islands in the Pacific Ocean which came under the administration of Japan after the defeat of the German Empire in World War I.-Early history:Under the terms of the Anglo-Japanese Alliance, after the start of World...
  
  , Kuril Islands
  Kuril Islands
  The Kuril Islands , in Russia's Sakhalin Oblast region, form a volcanic archipelago that stretches approximately northeast from Hokkaidō, Japan, to Kamchatka, Russia, separating the Sea of Okhotsk from the North Pacific Ocean. There are 56 islands and many more minor rocks. It consists of Greater...
  
   and Kamchatka Peninsula
  Kamchatka Peninsula
  The Kamchatka Peninsula is a peninsula in the Russian Far East, with an area of . It lies between the Pacific Ocean to the east and the Sea of Okhotsk to the west...
  
  .
• 19 August 1937: She was assigned to the 3rd Fleet
  IJN 3rd Fleet
  The was a fleet of the Imperial Japanese Navy, which was created on six separate occasions.-Russo-Japanese War:First established on 28 December 1903, the IJN 3rd Fleet was created by the Imperial General Headquarters as an administrative unit to manage various vessels considered too obsolete for...
  
  .
• 10 October 1937: She was assigned to the China Area Fleet.
• 5 December 1941: She was assigned to the Yokosuka Naval District.
• (after): She spent her time on convoy escort operations in the Yokosuka
  Yokosuka, Kanagawa
  is a city located in Kanagawa, Japan. As of 2010, the city had an estimated population of 419,067 and a population density of 4,160 people per km². It covered an area of 100.62 km²...
  
   Area.
• 20 July 1942: She was assigned to the 5th Fleet
  IJN 5th Fleet
  The was a fleet of the Imperial Japanese Navy, active during the early portions of the Second Sino-Japanese War, and again in World War II, primarily in the Battle of the Aleutian Islands.-China Expeditionary Fleet:...
  
  .
• August–September 1942: She surveyed at Aleutian Islands.
• 29 September 1942: Heavy damaged by U.S. aircraft at Kiska
  Kiska
  Kiska is an island in the Rat Islands group of the Aleutian Islands of Alaska located at . It is about long and varies in width from - Discovery :...
  
  .
• 13 October 1942: Repairs were started at Yokosuka Naval Arsenal
  Yokosuka Naval Arsenal
  was one of four principal naval shipyards owned and operated by the Imperial Japanese Navy, and was located at Yokosuka city, Kanagawa prefecture on Tokyo Bay, south of Yokohama...
  
  .
• 1 November 1942: She was assigned to the Yokosuka Naval District.
• (after): She spent her time on convoy escort operations in the Yokosuka Area, 38 times.
• 16 January 1944: She was assigned to the flagship of the 3rd Escort Group, Escort Fleet.
• 15 April 1945: She was assigned to the flagship of the 4th Suicide Attack Division, Yokosuka Naval District.

Fate

• 27 July 1945: Sunk in shallow water by aircraft at Owase
  Owase, Mie
  is a city located in the south of Mie, Japan. As of 2008, the city has an estimated population of 21,002 and the density of 109 persons per km². The total area is 193.16 km²....
  
  .
• 30 November 1945: Decommissioned.
• In 1949. Salvaged and scrapped.