“A Naval Review took place [on 11 October 1940] to celebrate the 2,600th anniversary of Emperor Jimmu’s enthronement. Ninety-eight IJN warships totalling 596,060 tons were present. Emperor Hirohito (Showa) inspected the fleet from his flagship, the battleship HIEI, which passed among the fleet’s ships escorted by heavy cruisers TAKAO, KAKO and FURUTAKA.
“The Emperor’s younger brother, Lt Cdr Prince Takamatsu, HIEI’s gunnery chief, introduced members of the royal family to the important personages onboard including navy minister Oikawa Koshiro. Vice Admiral Isoroku Yamamoto, CINC Japanese Combined Fleet, supervised the ceremony from his flagship, the battleship NAGATO.
Other IJN ships at the Imperial Naval Review were:
· IJN submarine tenders CHOGEI and JINGEI
· IJN auxiliary ship MAMIYA
· IJN submarine I-66.”
– World War II Sea War, Volume 3, by Donald A Bertke, Gordon Smith, Don Kindell, 2012