Interrogation NAV No. 8
USSBS No. 46
Tokyo, 17 October 1945
Interrogation of: Commander Sekino, H., IJN, twenty years in Navy. Communication Officer, Staff, 6th Cruiser Squadron at Coral Sea, and Commander Okumiya, Masatake, IJN. Staff, Second Flying Squadron. Both officers currently members of General Staff.
Interrogated by: Captain C. Shands, USN.
Summary
Ryujo (carrier) sunk in the Battle of the Eastern Solomons, 23 August, by U.S. carrier planes, removing air protection for convoy for reinforcement of Japanese forces on Guadalcanal. B-17 sank destroyer.
The Hyei and Haruna exchanged positions at Midway the day before the main battle. Haruna, with carrier force, received no damage until 1945 at Kure by U. S. Navy dive bombers.
Transcript
Battle of the Eastern Solomons
In the Battle of the Eastern Solomons on the 23 August 1942, what was the position of the Ryujo?
It was near Bradley Reefs, latitude 7 degrees south, 161 degrees east. The Zuikaku and Shokaku were there too but separated into different units about ninety or one hundred miles to the north and east.
Was the Ryujo sunk and how?
Yes, very quickly on the 24th. She was hit by at least ten bombs and torpedoes. Bombs came from dive bombers.
Were any hits made by horizontal bombers?
Not a single hit.
Were other ships hit there?
No battleships or cruisers were hit. However, on the 25th in mid-morning a destroyer which was escorting transports to Guadalcanal from Rabaul in a separate force north of Guadalcanal, was hit and sunk in the forenoon by B-17s. This was an old type destroyer which was standing by the Kikokawa Maru. The transport had been attacked by dive bombers from Guadalcanal and was damaged. The escort was standing by. The escort saw the high bombers coming but did not worry and did not get underway. I talked to the commanding officer, Commander Hatano, afterward. He was surprised that he was hit, because this was the first ship known to have been hit by horizontal bombers in the war. Commander Hatano was my classmate at Etajima and said, “Even the B-17s could make a hit once in a while.”
Were any Me 109s employed in the Solomons area?
No. Only one Messerschmitt fighter 109 was brought from Germany. It was used for test. It may be confused with carrier-borne two-seater reconnaissance bomber.
Confirmation of Previous Interrogations
Did you have radar at Coral Sea battle?
Not on cruisers. Maybe carriers had it, but do not think so.
What battleships were present with the First Air Fleet on the day of the Battle of Midway?
Kirishima and Haruna. The Hiei started out with this fleet but exchanged position with the Haruna just before the day of the battle. The Hiei joined the main body and the Haruna joined the carrier force.
Had the Haruna been damaged?
It was damaged at Kure by dive bombers this year. It has never been damaged before.
What was the plan of action for the cruisers the night of 4 June at Midway?
On the evening of 4 June, Japanese carrier group had been heavily damaged. The Seventh Cruiser Squadron was ordered at full speed to bombard the airfield at Midway. On the way, appearance of submarines was reported, so they made emergency evasive turn resulting in collision between Mikuma and Mogami. The Mogami’s bow was most seriously damaged and was difficult to steer, but it followed the Mikuma for protection. Due to loss of speed and ability to steer, the next morning the Mogami was attacked and damaged by American dive bomber planes. The Mikuma was sunk at the same time.
Was the Mogami attacked also?
Yes, but received no great damage.
Were any radars used at the Battle of Midway?
Not sure. The battleships Ise and Hyuga had them about that time.
In the night battle of Savo Island, did you have radar that night?
No, visual fire control was used on that night—8 August.
In the Battle of Santa Cruz, 26 October 1942, how early did you have information of our carrier force?
Tone and Terutsuki were scouting from position approximately 167.5 degrees east and 7 degrees south. The patrol planes from the Gilberts discovered American ships from Hebrides and sent word to Japanese cruisers by radio about four or five days before the battle. When these ships received word, they returned to main body north of the Solomons.