Giretsu Special Forces with sub machine-gun Type-100.
Captain Okuyama and Giretsu Airborne unit depart on their mission to Okinawa.
The Giretsu (Gallantry) Airborne Unit was formed in the
autumn of 1944 to attack B-29 bases in the Marianas. The planned January 1945
Marianas mission was cancelled when forward bases on Iwo Jima were damaged, but
in May 1945 the target shifted to US bases recently established around Yontan
on Okinawa. Operation Gi was launched on May 24, with Type 97
("Sally") bombers as transports. Several aircraft returned to base
with engine problems, and seven reached Okinawa, with 98 personnel. Some of these
aircraft were shot down during the approaches to the runways, and the rest
crash-landed before midnight.
On 16 May 1945, the Japanese Sixth Army requested the
deployment of the Giretsu Unit to neutralize those airfields. "Operation Gi-gou" deployed on the
night of 24May 1945. Japanese air
operations included major diversionary bombing attacks throughout the region
striking Ie Shima and softening up American defenses defending Yontan and
Kadena. Twelve Ki-21II "Sally"
medium bombers with 136 commandos departed from Kengun Field, Kumamoto, Japan
at dusk for the commando attack. Eight
of the bombers, lead by Captain Watanabe, were slated to attack Yontan and
four, lead by Captain Okuyama, were to attack nearby Kadena.
The twelve troop laden attacking Giretsu aircraft were to
belly land on the runways instead of a conventional parachute assault. This tactic was chosen to gain the element of
surprise and most importantly, to deliver their raiders exactly where they
needed to be, en mass, to maximize their destructive capability. Descending with wheels up would also
decisively shorten their landing and effectively block the runways. The Giretsu knew they were on a mission vital
to the Japanese war effort. Objectives
included destroying as many aircraft as possible, specifically any B-29's, (of
which there were none,) the night fighters of VMF(N) 533, fuel dumps and
installations. They were instructed to
fight on until relieved. (The Japanese
army assured the Giretsu troops there would be additional air and ground
attacks the following morning in support of the raiders-those actions never
materialized.)
One aircraft actually made it onto Yontan Field during the
melee. (Those slated to attack Kadena-never made it to their destination.) During the night five enemy aircraft were
intercepted and shot down by VMF(N) 533, and one by VMF(N) 543. Six additional enemy bombers were dispatched
by Marine anti- aircraft units protecting Yontan Field. In the aftermath of the attack, the map taken
from deceased Captain Watanabe, revealed with large red "X's," the
exact positions of where VMF(N) 533, Black Mac's Killers Hellcats were parked
and a large red "X" on Black Mac's tent location. They failed to accomplish these
objectives. The Giretsu raiders:
destroyed 9 aircraft (3 F4U's, 2 PB4Y's [probably mistaken for B-29's], 1 R5C,
3 C47's), damaged 24 others (17 F4U's, 3 F6F's, 2 B-24's, 2 Transports),
detonated a 70 thousand gallon fuel storage tank and damaged a number of
adjacent installations.
69 Japanese casualties were recovered from the wreckage near
Yontan Field, including the 11 aboard the aircraft (tail number 546) that
successfully belly-landed. The other 67
Giretsu attackers aboard the remaining 6 Ki-21II bombers did not complete their
mission-none of their remains were recovered.
The Marines suffered 3 KIA--1st Lt. Maynard Kelley, killed while manning
a search light on the deck of the control tower, and two Marines smothered when
a crashing "Sally" hit their A-A gun mount. During the fight an additional 18 Marines
were wounded. When VMF(N) 533's night
fighters, on station when the attack began, ran low on fuel they were diverted
to Kadena Field to refuel and standby until they were cleared to return to
base. Yontan Field was operational by
mid-morning on the 25th. This was the
only raid of its kind conducted by the Japanese during the war. The Giretsu raid was a desperate heroic
effort mounted by the Japanese Military-but not much more than another night of
combat for the Americans involved; operations continued unabated and the
outcome was already inevitable.
Bruce Porter recounts the attack in his book, Ace!
"Over a dozen Japanese giretsu commandos survived the
suicide landing, and succeeded in destroying a large fuel dump (a total of
70,000 gallons) and planting magnetic grenades to aircraft on the flight line.
Three F4U's, two PB4Y's and four transports were destroyed. In addition, 22
other F4U's, 3 F6F's, 2 B-24's and 2 transports were damaged. Only three Americans died in the raid, 18
Marines wounded. Japanese losses were 69 pilots, aircrews and raiders."
Joseph Alexander, The Final Campaign Marines Victory on
Okinawa
"Another bizarre Japanese suicide mission proved more
effective. On the night of 24-25 May, a half-dozen transport planes loaded with
Giretsu, Japanese commandos, approached the U.S. airbase at Yontan. Alert
antiaircraft gunners flamed five. The surviving plane made a wheels-up belly
landing on the air strip, discharging troops as she slid in sparks and flames
along the surface. The commandos blew up eight U.S. planes, damaged twice as
many more, set fire to 70,000 gallons of aviation gasoline, and generally
created havoc throughout the night. Jittery aviation and security troops fired
at shadows, injuring their own men more than the Japanese. It took 12 hours to
hunt down and kill the last raider."
The IJN also planned Operation Ken-gou against the Marianas
bases using 300 troops of the Special Naval Landing Force carried by 30 Betty
bombers. US forces, however, discovered the plan from radio intercepts and the
transport force was destroyed at Misawa airbase by a US carrier air strike on
July 14, 1945. At least two other large raids were ready in August 1945,
including an IJA attack using gliders, but the war ended before they took
place.