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Interrogation Nav 60, Captain Yasumi Toyama

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1 Nov 1945


TOYAMA, Yasumi, Captain, I.J.N.

TOYAMA served 21 years in the regular Navy. As Chief of Staff on the Jintsu (CL), Flagship of the Second Destroyer Squadron, he escorted the Transport Force at the Battle of MIDWAY. In August 1942, he was again in the Jintsu when damaged by dive-bombers while escorting transports in the Battle of the Eastern SOLOMONS. At TASSAFARONGA, 30 November 1942, he was Chief of Staff, Second Destroyer Squadron during the night destroyer action. He exhibited an accurate memory for details of these actions which he checked by means of several personal notebooks. The veracity of his statements has subsequently been proved correct through official documents. He readily volunteered pertinent information concerning these actions, while at the same time displayed unusual professional interest in the actions of the opposing American forces.

Chief of Staff, Second Torpedo Squadron1941-1943
Naval Technical DepartmentTOKYO1943-1944
Staff, Imperial HeadquartersTOKYO1944-1945
Commanding Officer, KASUMIGAURA Airbase1945



Interrogation of: Captain TOYAMA, Yasumi, IJN; Chief of Staff Second Destroyer Squadron, flagship Jintsu (CL), at MIDWAY and Eastern SOLOMONS. OTC at TASSAFARONGA.

Interrogated by: Captain C. Shands, USN.

Allied Officers Present: Colonel Cole, USA.


MIDWAY. List of transport force at MIDWAY. Sketch showing fall of bombs from horizontal-bombing attack, 3 June. Also torpedo hit on Akebono Maru during night, 3-4 June. No other attacks on transports. Loss of carriers during May and June 1942 necessitated reorganization of striking forces. Diversion of seaplane tenders and battleships for reconversion to carriers further reduced available naval ships. Offensive war ended, defensive started.

EASTERN SOLOMONS. Transport Kinryu Maru (?) damaged and abandoned after dive-bombing attack. Mutsuki (DD) sunk by B-17's in horizontal-bombing attack. Reinforcement of Japanese forces cancelled due loss of air support as a result of sinking Ryujo (CV) and damage sustained by Shokaku. Jintsu (CL) damaged by dive-bombers.

TASSAFARONGA. DesRon 2, while reinforcing Japanese forces on GUADALCANAL, engaged U.S.Cruiser Force. U.S. cruisers damaged by torpedoes. Takanami (DD) sunk by shell fire from cruisers. Naganami (DD) received superficial damage. Landing operations repulsed.



Q. What ships were present in the occupation force at MIDWAY?
A. The occupation force was divided into several smaller units as follows

Indirect Escort

Second Fleet
Vice Admiral KONDO, N., CinC; Rear Admiral SHIRAISHI, Chief of Staff
BatDiv 3
Vice Admiral KONDO
Kongo (BB)
Hiei (BB)
CruDiv 4
Rear Admiral MIKAWA
Atago (CA)
Chokai (CA)
DesRon 4
Rear Admiral NISHIMURA
Naka (CL)
4 DD's
Supply Group and Tankers

Fast Support
CruDiv 7; Rear Admiral KURITA
Suzuya (CA)
Kumano (CA)
Mogami (CA)
Mikuma (CA)
1 Tanker

Direct Escort and Occupation Force (Kuchiku Sentai)

DesRon 2
Rear Admiral TANAKA, R., OTC; Captain TOYAMA, Y., Chief of Staff
Jintsu (CL) (F)
DesDiv 15 (15 Kuchikutai) 3 DD's
DesDiv 16 (16 Kuchikutai) 4 DD's
DesDiv 18 (18 Kuchikutai) 4 DD's
CarDiv 11 (Koku Sentai)
Rear Admiral FUJITA, R.
Kamikawa Maru
1 DD
4 Patrol Boats
3 Submarine Chasers
1 Tanker
Kinryu Maru
Argentine Maru
Kyozumi Maru
Brazil Maru
2 Army Transports
(Names unknown)
Special Navy Landing Force Troops.
About 1500 Marines for SAND Island.
1000 Army for EASTERN Island.
11th and 12th Construction Battalion (Setsueitai).
1 Survey Force.
1 Weather Group.
About 50 Marines and 11th Air Flotilla for KURE Island Seaplane Base.

(The Mizuho was supposed to accompany the Chitose but was sunk by a U.S. submarine between OMIAZAKI and DAIOAZAKI May 1942, so the Kamikawa Maru was substituted.)

Q. What was your navigation track?
A. The Direct Escort led by the Jintsu departed SAIPAN, passed to the west of TINIAN, then proceeded to about 28° N, 165° W, then east to the rendezvous point 26° 15' N, 175° 40' E. Some of the slow transports started from ENIWETOK. We were given air coverage by the 24th Flying Squadron from the MARSHALLS and by the 26th from MARCUS. Due to a submarine report we did not quite reach the rendezvous point with the Second Fleet but changed course to the northeast. About two days before the carrier battle we joined the Second Fleet but operated as a separate force. We cruised several miles apart, at maximum speed ten knots due to slow transports.

Q. Did you zig-zag in formation?
A. Yes, the naval vessels zig-zagged day and night; but due to the slow speed, the transports did not zig-zag. If near a submarine they would avoid by independent action.

Q. In what direction were you intending to approach MIDWAY for the landing?
A. We were going to approach the south side, sending out landing boats as far as the reef. We had many different kinds of landing boats but did not think that many would be able to pass over the reefs. If they got stuck the personnel were supposed to transfer to rubber landing boats. We had plenty of equipment for a three month's occupation without help, but were not sure of our boats.

Q. Did you plan to send ships to PEARL and HERMES Reef?
A. No, only to KURE, EASTERN and SAND Islands.

Q. During your approach were you attacked?
A. About 0915, 3 June (+12), we saw one PBY circling formation about 600 miles west of MIDWAY, but no attack. About 1700 the same day, we were attacked by 9 B-17's. They were at different altitudes, between 5-6000 meters. They surprised us, but did not have time to open fire. The nearest bombs landed about 200 meters from a ship. No damage. (See Annex A). We saw PBY's later but they did not attack. About midnight that same night we were attacked by two or three more PBY's. One dropped a torpedo which hit the tanker Akebono Maru in the bow. Eleven men were killed and 13 wounded but it did not sink, only slowed down. The PBY's also strafed the column of ships killing a few men but did no damage.

Q. Were you maneuvering during these attacks?
A. The Naval vessels were steaming about 12 knots, zig-zagging. The transports did not zig-zag because both attacks surprised us. They held a steady course at about ten knots.

Q. Were there any battleships or heavy cruisers in your formation?
A. There were none in our formation. Only the Jintsu. The battleships and heavy cruisers were several miles away.

Q. When did you retire?
A. During the night after the carrier battle we received orders for the transports to retire. The 15th Destroyer Group (3 DD) accompanied them. The Jintsu with the 16th and 18th Destroyer Group (8 DD) were directed to proceed to the carrier area and rendezvoused with the Main Body in that vicinity in case of a surface action. CruDiv 7 (Suzuya, Kumano, Mogami and Mikuma) were ordered to proceed towards MIDWAY. During the night the Mikuma collided so the entire division retired. The Jintsu and 8 DD's approached the battle area and saw one carrier burning. About the same time we received a report that the U.S. Task Force was coming, so we retired and joined the Yamato and Main Body about 0855, 6 June (ZT-9). About 0900/7, CruDiv 7 (Susuya, Kumano), 4th Squadron (Atago, Chokai ), 8th Squadron (Tone, Chikuma) and 2nd Destroyer Squadron (Jintsu, 8 DD's) left the Main Body and went south to rendezvous with the Mogami in case fast units of the American Fleet were there. We rendezvoused with the Mogami at 0600, 8 June (ZT-), about 28° N, 171° E; then proceeded due west to rejoin the Main Body and transports, joining at 1300, 9 June (-9). The entire fleet rendezvoused and refueled all day 9 June (-9). The fleet then proceeded west. Later some ships went to JAPAN, some to TRUK and the transports to GUAM and SAIPAN.

Q. While you were retiring were you attacked?
A. No, but we expected it. The Mogami and Mikuma to the southeast of us were attacked on 7 June (-) 9; Mogami damaged, Mikuma sunk. We were trying to come between the Mogami group and the American force to help the Mogami. The destroyer Arashio rescued the survivors from the Mikuma.

Q. Did the Battle of MIDWAY have any effect upon your planning?
A. The loss of five carriers in May and June with several others damaged made it necessary to reorganize our striking forces. We wanted to capture MIDWAY to prevent another air attack upon JAPAN similar to the attack on 18 April. We also wanted to use it for search as we did MARCUS and WAKE. We did not think the American forces were so strong as they were at MIDWAY. The loss of the carriers was later felt in our operations. We were unable to use seaplanes for long-range reconnaissance because we had to convert seaplane tenders like the Chitose to aircraft carriers. We also had to convert the Ise and Hyuga (BB's) to carriers so they were lost to us for a long time. After MIDWAY we were defensive trying to hold what we had instead of expanding.

Battle of the Eastern SOLOMONS, 25 August 1942.

Q. What was your mission in the SOLOMONS Area in August?
A. We were escorting special Army and Navy troops to Cape DABIT on GUADALCANAL. I was Chief of Staff to Rear Admiral TANAKA on the Jintsu (CL). We also had four destroyers and four transports with us. The Ryujo was operating to the east of us. Sometimes we would see it. The Shokaku and Zuikaku were also operating to the east but we never saw them.

Q. Were you ever attacked?
A. Yes, the morning of 25 August we were attacked by dive-bombers. We were about 100 miles north of GUADALCANAL proceeding south at about 9 knots because of a slow transport. About 0700 (-9), about 12 dive-bombers attacked us. The Jintsu was hit on the port side between number one and two turrets. The 2nd Destroyer Squadron Staff then transferred to the Naganami (DD) and the Jintsu returned to the homeland for repair. One transport was also badly damaged at the same time. I think that it was the Kinryu Maru.

Q. Did you receive any other attacks?
A. The Jintsu was not attacked again, but the Kinryu Maru and the Mutsuki (DD) were attacked by B-17's about two hours later. The transport had been abandoned and was sinking. The Mutsuki had stopped and was preparing to torpedo the transport when 9 B-17's bombed and sank it. A number of men were rescued by other destroyers. The transport was not hit at that time but was torpedoed by another destroyer.

Q. Were those destroyers from your own force?
A. No, we had retired a few miles to the north. There were four destroyers, I think from the Eighth Fleet. They had bombarded GUADALCANAL the night before and were to join us on the 25th as additional escort. They had been attacked by dive-bombers during the night but not hit.

Q. Where did you go after the attack?
A. We escorted the remaining transports to the SHORTLAND ISLANDS. The 2nd Destroyer Staff then shifted to the Kagero (DD).

Q. Why didn't you continue and land your troops at GUADALCANAL?
A. We were ordered back. I think that it may have been because of the loss of the Ryujo and damage to the Shokaku. We did not have air support for a landing.

Battle of TASSAFARONGA, 30 November 1942

Q. What ships were present during the Battle of TASSAFARONGA?
A. Flagship Naganami (DD), Rear Admiral TANAKA, and the 2nd Destroyer Squadron which was composed of the 15th Destroyer Division (Oyashio, Kurashio, Kagero), the 24th Destroyer Division (Kawakaze, Suzukaze) and the 13th Destroyer Division (Takanami, Naganami and the Makanami).

Q. Were there any heavy ships present?
A. No, just destroyers. The Jintsu was being repaired in JAPAN. No other cruisers or transports were there.

Q. What was your objective that night?
A. We had left BUIN on the night of the 29th, passed through BOUGAINVILLE Strait on course 090°, just past RONCADOR Reef; then south to RAMOS Island, passed west of RUA DIKA and BUENA VISTA Island, then south of SAVO Island. We were intending to land supplies and a few troops at TASSAFARONGA.

Q. Did you receive any air attacks during your passage?
A. No air attacks either going down or returning except flares which were dropped during the night action.

Q. Did you have radar search or fire control equipment?
A. No radar of any sort. Visual fire control only. We received a wireless report from RABAUL that some of your cruisers were present in the GUADALCANAL Area, but no details.

Q. Give a description of the battle.
A. We were proceeding on a southwesterly course between Cape ESPERANCE and SAVO Island, speed 15 knots. The ships were in column with the Takanami on the port bow as a picket ship. Between Cape ESPERANCE and TASSAFARONGA we had slowed to 12 knots; getting ready to land our supplies, when your ships were sighted. Just after we had slowed down and just before we turned, we saw two torpedoes pass ahead of us. You also opened fire at the same time. That was the first time we saw your ships. We immediately increased speed to 24 knots and reversed course. The three divisions made a simultaneous column turn, with the division leaders in the lead. We had practiced this turn for about a year and one-half at night. I had sent out a signal not to open fire with guns unless necessary. The Takanami fired about seventy rounds and was the only ship to open up. Because it opened fire, it was concentrated upon by the American ships and sunk. It was the only ship sunk during the action.

When we sighted your ships, I sent out a signal to turn and to execute a mass torpedo attack. The destroyers fired as fast as they could. We saw torpedoes hit the flagship of your force and also hit several destroyers which were burning. Because of your starshells and airplane flares, I was afraid that your ships would follow us. Our ships were again in column about five miles north of Cape ESPERANCE. I thought that your force would pass north of SAVO Island and try to intercept us if we retired the same direction that we came in; so we retired at full speed to the northwest between NEW GEORGIA and SANTA ISABEL Island.

Q. Did you return and land your supplies?
A. No, we returned to BUIN. We landed the troops and supplies later on 3, 7 and 10 December.

Q. Were any more of your ships hit by American torpedoes or gunfire?
A. The Takanami (DD) was the only one sunk. The Naganami received two shrapnel hits in the after stack. That was the only damage. Many near misses, no torpedo hits.

Q. Did your destroyers zig-zag during the battle?
A. We did not zig-zag, only increased speed.

Q. Did you have any ships present with just one stack?
A. No, only new type destroyers with two stacks. ww2dbase

United States Strategic Bombing Survey (Pacific) Interrogation of Japanese Officials [OPNAV-P-03-100], courtesy of ibilio Hyperwar Project

Added By:
C. Peter Chen


Diagram showing attacks on Japanese transports during Battle of Midway, 3-4 Jun 1942; Annex A of ToyamaJapanese track chart during Battle of Eastern Solomons, 23-25 Aug 1942; Annex B of Toyama

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Associated Event(s):
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Associated Ship(s):
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