In the twilight of World War II, the Imperial Japanese Navy devised an extreme measure that embodied the saying, “desperate times call for desperate measures.” During a worsening crisis and confronting an approaching U.S. Navy, Japan unveiled the Yokosuka MXY-7 Ohka—a rocket-propelled, pilot-guided kamikaze aircraft created as a ‘flying bomb’. Despite its advanced design and the committed sacrifice of its pilots, the Ohka had limited impact on the war, with only 50 deployed in combat leading to just three enemy ship sinkings prior to Japan’s surrender.
The Ohka, named “cherry blossom,” made its maiden unpowered flight on March 21, 1944, followed by a powered flight in November of that year. It was officially deployed by the Imperial Japanese Navy (IJN) Air Service in 1945. Ensign Mitsuo Ohta designed this aircraft as a distinctive and desperate innovation, setting it apart from other rocket-powered warplanes like the Mitsubishi J8M Shūsui of that era. Unlike the Shūsui, the Ohka was specifically intended for kamikaze missions.
The aircraft was dubbed a “Baka Bomb” by the Americans, deriving from the Japanese term for “foolish” or “stupid.” Despite its moniker, this flying bomb housed a substantial warhead in the nose and was designed to be transported to the target zone by a Mitsubishi G4M2e “Betty” bomber due to its limited range. Once released from the carrier aircraft, the Ohka would activate its rocket engines for a rapid dash towards the target, typically a ship.
The Ohka’s specs were as deadly as they were straightforward: one crew member, 19 feet 11 inches fuselage length, 16 feet 10 inches wingspan, and a 2,646-pound warhead. It could hit a top airspeed of 615 mph (Mach 0.80) in a powered dive, driven by Type 4 Mk.1 Model 20 rockets with a total thrust of 1,764 pounds.
Combat performance of the Ohka was a stark reminder of the dire straits Japan faced. Only 50 saw actual combat use, achieving just three ship kills—none of them capital ships. It was too little, too late for the kamikaze campaign, and the war concluded with the atomic bomb raids and Japan’s surrender, cutting short any further use of the Ohka.
Today, of the 852 Ohkas built, only 15 remain globally, on display in museums in India, Japan, the UK, and the U.S. These relics stand as a stark reminder of the extreme measures a nation at war may take when confronted with looming defeat. Despite its speed and destructive power, the Ohka still stands as a poignant emblem of Japan’s futile last-ditch efforts to halt the course of an unwinnable war.
Reflecting on the Ohka’s legacy, it’s important to grasp the wider context of the kamikaze strategy, notably seen during the Battle of Leyte Gulf in October 1944. These attacks were a key element of Japan’s plan to maximize damage on the advancing Allied fleet, leading to significant casualties on both sides. The Yokosuka MXY-7 Ohka symbolized the intersection of technological advancement and the tragic human toll of war, serving as a final, desperate move in a war slipping from Imperial Japan’s grasp.
Relevant articles:
– Meet the Ohka: Japan’s ‘Flying Bomb’ Kamikaze Plane, The National Interest
– How effective was the Japanese kamikaze campaign?, iwm.org.uk
– Yokosuka MXY-7 Model 11 ‘Ohka’, Planes of Fame Air Museum