*Laid down on 29 August 1918, launched 14th July '19 and commissioned on 31th August '20.
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*Immediately after her working up she was sent to support Japanese forces fighting the Bolshevik Russian forces in Siberia. After a refit in 1934 she supported forces now fighting in China before fulfilling her designed role as the flagship of a submarine force for a year.
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*With Japan's entry into the war she was part of the Philippines covering force, and supported forces for the next few months as the island was slowly captured. She survived attacks from B17s and PT boats unscathed and sank numerous small transports.
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*Following this she carried out transport and patrol runs around the Dutch East Indies and New Guinea before having a refit to improve her AA in Nov '43.
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*She met her end in January of '44 when she was spotted off Penang by ''[https://en.wikipedia.org/wiki/HMS_Tally-Ho HMS Tally-Ho]'' who managed to hit her with two torpedoes causing her to slow and list. Unfortunately for her a deck fire had started and spread to her depth charges, causing a massive explosion which tore the stern off and rapidly sank her. ''[[Uranami]]'' rescued survivors.
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*Her wreck was discovered in 2004 but like other ships sunk in the area her wreck has been mostly destroyed by illegal salvage.