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Type 4 Ho-Ro – Self Propelled Gun

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Specs
  • No. Built 12
  • Weight 16.3 tons
  • Length 18.1 ft.
  • Width 7.64 ft.
  • Height 7.4 ft.
  • Crew 6
  • Armor Thickness .98 in.
  • Main Armament 150 mm Type 38 Howitzer
  • Engine Mitsubishi Type 100 V-12 diesel
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Thanks to the National Museum of the U.S. Marine Corps., the American Heritage Museum has added the last known WWII Japanese Ho-Ro self-propelled gun to the Pacific War exhibit.

The Type 4 Ho-Ro was a self-propelled 150mm gun that saw limited service with the Imperial Japanese Army in the Pacific War. Japanese engineers based the Type 4 Ho-Ro on the German “Grille” (German for “Cricket”) using the chassis from Type 97 Japanese tanks. The Type 4 Ho-Ro was rushed into service and typically deployed in batteries of four, that saw combat as part of the 2nd Tank Division during the Philippines campaign. The remaining units were deployed to Okinawa for island defense, but were quickly decimated by American artillery during the Battle of Okinawa.

This Ho-Ro saw its last action at the Battle of Luzon near Clark Airfield in the Philippines, January 1945. It was under command of an Independent Gun Company alongside the Japanese 8th Infantry Division with additional support by the Japanese 2nd Tank Division with units of Chi-Ha Kai medium tanks. The battle was short-lived with the crew abandoning the cannon and forced to retreat into the forest.

Even though the Type 4 Ho-Ro was designed as an offensive weapon, because of its late introduction in the war, it was forced to become a defensive one. In the end, its limited quantity and outdated design led many Type 4s to be destroyed by Allied artillery.

The Type 4 was never mass-produced. As a result, only 12 Type 4 Ho-Ro’s were made. This Type 4 Ho-Ro was captured at Luzon and is the only example that remains. The Ho-Ro is a fascinating addition to the LVT(A)-4 landing vehicle, M29 Weasel personnel carrier,
Daimaler Mk.2 personnel carrier, M3 A75mm gun motor carriage and Model 97 towed gun in the Pacific War exhibit.

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Museum Re-Opens Wednesday, July 8th, 2020

As a part of the Reopening Massachusetts Phase III, the American Heritage Museum will be re-opening to the public on Wednesday, July 8, 2020 and will be open Wednesday through Sunday from 10am to 5pm. All visitors will be required to wear face masks while visiting the indoor spaces per state requirements.