15/11/1935-01/12/1936=
Kure N.D.F./Sub.School;Otake;
(Training Ship);

19/08/1937-//193 =23rd Air Div.
[Seaplane Tender];

15/08/1938-15/11/1939=
Sub.Ron.1; 1stFleet;

15/11/1939-15/11/1940=
Sub.Ron3; 2ndFleet;

15/11/1940-15/12/1941=
Sub.Ron3;6th Fleet;

15/12/1941-20/10/1942=
3rd Reserve;Kure N.D.F;

20/10/1942-30/11/1942=
1st Reserve;Maizuru N.D.F;

30/11/1942-10/02/1943=
3rd Fleet;

10/02/1943-12/06/1943=
3rd Fleet; (Training Ship);

12/06/1943-10/07/1944=
Car.Div.2; 3rd Fleet;

10/07/1944-26/08/1944=
Car.Div.1; 3rd Fleet;

26/08/1944-15/11/1944=
Car.Div.4; 3rd Fleet;

15/11/1944-20/04/1945=
Car.Div.1; Combined Fleet;

20/04/1945-01/06/1945=
4th Reserve, Kure N.D.F;

31/03/1934-15/12/1941=Submarine Tender;
/12/1941-28/11/1942=Conversion to CV;
15/12/1941-01/06/1945=Aircraft Carrier;
01/06/1945-30/11/1945=
Special Guard Ship; (Coast Battery);

CEO:Cpt.Sukigara Tamazo [37]=
20/10/1933-23/03/1934;
CO:Cpt:Sukigara Tamazo [37]=
23/03/1934-15/11/1934;
CO:Cpt:Takasu Sanjiro [37]=
15/11/1934-16/11/1936;
CO:Cpt.Moizumi Shinichi [37]=
16/11/1936-01/12/1936;
CO:Cpt:Minowa Chyugo [38]=
01/12/1936-15/11/1937;
CO:Cpt:Mori Tokuji [40]=
15/11/1937-25/05/1938;
CO:Cpt.Nakazato Ryuji [39]=.
25/05/1938-15/12/1938;
CO:Cpt:Harada Kaku [41]=
15/12/1938-15/11/1939;
CO:Cpt:Nakamura Motoji [39]=
15/11/1939-10/04/1941;
CO:Cpt:Okura Tomesaburo [43]=
10/04/1941-10/11/1941;
CO:Cpt;Kiyama Tatsuo [42]=
10/11/1941-23/04/1942;
CO:Cpt:Soma Shinshiro [42]=
23/04/1942-01/11/1942;
CO:Cpt:Kamei Yoshio [46]=
01/11/1942-16/03/1944;
CO:Cpt.Matsuura Yoshi [49]=
16/03/1944-20/01/1945;
CO:Cpt.Takahashi Chojuro [49]=
20/01/1945-28/04/1945;
CO:Cpt.Sasaki Kiyoji [40]=
28/04/1945-30/11/1945;

28/11/1942 Renamed Ryuho;

30/11/1945= Removed from Navy List;
1946=Scrapped,Kure;