The Type 4 15cm self-propelled gun Ho-Ro (日本語: 四式十五糎自走砲 ホロ Imperial Japanese Army Type 4 15cm self-propelled gun Ho-Ro?) was a self-propelled gun developed by the Imperial Japanese Army in World War II.Inspired by the
Grille series of
self propelled artillery vehicles developed by
Nazi Germany during
World War II, wherein a
15 cm sIG 33 infantry support gun was mounted on a tracked chassis, engineers at the Army Technical Bureau resolved to do the same. Production was assigned to
Mitsubishi Heavy Industries. The exact number produced in 1944 is uncertain, but was approximately 12 units.
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