Home Base:Yokosuka ND;
15/11/1939-15/11/1940=Sub.Div.2; Submarine School; Otake;
15/11/1940-01/02/1942=Sub.Div.2;Sub.Ron.1;6th Fleet;Combined Fleet;
01/02/1942-10/03/1942=Sub.Div.1;6th Fleet;Combined Fleet;
10/03/1942-01/04/1943=Sub.Div.1;Sub.Ron.8;6th Fleet;Combined Fleet;

CEO:Cdr.Hatanaka Sumihiko [49]=01/07/1940-31/01/1941;
CO:Cdr.Hatanaka Sumihiko [49]=31/01/1941-25/08/1941;
CO: Cdr.Otani Kiyonori [49]=25/08/1941-01/12/1942;
CO:Cdr.Muraoka Tomiichi [52]=01/12/1942-11/02/1943+KIA;

07/12/1941 Launched M'Sub.#?; Lt(jg)Furuno Shigemi; PearlHarbour;
09/06/1942 Jettisoned M'Sub.#? Lt(jg)Ota Masuharu; Damaged; Mozambique Channel;

? Renumbered I-18;
11/02/1943 Sunk=se.Indispensable Reef;14*15'S;161*59'E;
US.DD.Fletcher;
Survivors; 102 KIA;
Presumed lost:11/02/1943;
01/04/1943 Removed from Navy List;

[Cdr.Otani Kiyonori] [49]
18/11/1941Kure-18/11/1941Kamegakubi=Transit;
19/11/1941Kamegakubi-22/12/1941Kwajalein=Hawaii(M'Sub);
04/01/1942Kwajalein-02/02/1942Yokosuka=Hawaii;(Repairs)
16/04/1942Hashirajima-27/04/1942Penang=Transit;
30/04/1942Penang-02/08/1942Penang=IndianOcean-Madagascar-MozambiqueChannel-Rodrigues Is-DiegoGarcia;
e/08/1942Penang-23/08/1942Yokosuka=Transit(Repairs);
[Cdr.Muraoka Tomiichi] [52]
17/12/1942Kure- l/12/1942Truk=Transit;
l/12/1942Truk-01/01/1943Shortland=Transit;
03/01/1943Shortland-07/01/1943Shortland=Guadalcanal(Supply 15t);
09/01/1943Shortland-13/01/1943Shortland=Guadalcanal(Supply 25t);
m/01/1943Shortland- m/01/1943Truk=Transit;
22/01/1943Truk-11/02/1943Sunk=Guadalcanal(Supply 18t)-SanCristobal+;

Sorties=6

[Cdr.Otani Kiyonori] [49]
08/06/1942sunk.No.MS.Wilford;2158t;MozambiqueChannel;20*20's;36*47'E;
01/07/1942sunk.Ne.MS.DeWeert;1805t;MozambiqueChannel;25*12'S;35*56'E;
08/07/1942sunkBr.MS.Mundra;7341t;MozambiqueChannel;28*45'S;32*20'E;

M/S Sunk =03@011304t
M/S Damaged =0
W/S Sunk =0 W/S Damaged =0
Total Sunk =03@011304t
Total Damaged =0
Total =03@011304t