noun
A drum used in historical Japanese warfare to signal troop movements or boost morale. Often associated with traditional festivals or reenactments today.
戦国時代、押し太鼓の音が戦場に響き渡った。
During the Warring States period, the sound of war drums echoed across the battlefield.
陣太鼓 is a more general term for a camp or battle drum, while 押し太鼓 specifically refers to a drum used to signal an advance or charge.
Compound of 押し (oshi, 'push, advance') and 太鼓 (taiko, 'drum'), referring to a drum beaten to urge troops forward.