I found a little info on LTC Ishii at this site:
http://archive.is/MiSf#selection-1437.0-1485.143
Ishii Hagumu
Eta Jima Class 52 (class ranking unknown)
Promoted Midshipman - 24 July 1924
Promoted Ensign - 1 December 1925
Promoted Lieutenant (j.g.) - 1 December 1927
Promoted Lieutenant - 1 December 1930
Promoted Lieutenant Commander - 1 December 1936
Commanding Officer, Uzuki - 15 December 1938 - 15 November 1939
Commanding Officer, Yayoi - 15 October 1940 - 10 September 1941
Commanding Officer, Hibiki - 25 September 1941 - 13 August 1942
Commanding Officer, Ikazuchi - 13 August 1942 - 27 August 1942
Promoted Commander - 1 November 1942
Ishii was KIA at some point during the war, but I don't know the circumstances or the date. In any event, he was posthumously promoted Captain.