Hitachi Air Raid & Naval Bombardment Memorial (Tōrin Monument)

The Tōrin Monument (陶輪碑) is a war memorial erected in 1957 at Narisawa Cemetery (成沢霊園) in Nishi-Narisawa-chō, Hitachi City, Ibaraki Prefecture. It commemorates the victims of the Allied attacks on Hitachi during the final months of World War II.

Hitachi was targeted because of its critical war industries, principally the Hitachi Manufacturing Company (日立製作所), which produced electrical equipment, radar components, and turbines for the Imperial Japanese military. The city's Taga Works (多賀工場), Mito Works (水戸工場), and Yamate Plant (山手工場), along with the Hitachi Mine copper refinery (日立鉱山電錬工場), were primary targets.

On the night of July 17–18, 1945, a powerful Allied naval task force under Rear Admiral Oscar C. Badger bombarded Hitachi in a 55-minute nighttime engagement — the third shore bombardment of the Japanese Home Islands after Kamaishi (July 14) and Muroran (July 15). The force comprised six battleships: USS Iowa (BB-61), USS Missouri (BB-63), USS Wisconsin (BB-64), USS North Carolina (BB-55), USS Alabama (BB-60), and HMS King George V; light cruisers USS Atlanta and USS Dayton; and ten destroyers (eight American, two British). The American battleships fired 1,238 sixteen-inch shells and the British battleship 267 fourteen-inch shells, while the light cruisers added 292 six-inch shells — approximately 1,800 shells total. The bombardment moderately damaged the Taga and Mito Works and lightly damaged the Yamate Plant and copper refinery, while devastating residential neighborhoods: 637 houses were completely destroyed, 1,059 half-destroyed, 317 civilians killed, 367 seriously injured, and 9 listed as missing in the Taga district alone.

The devastation was compounded by B-29 strategic bombing raids. On June 10, 1945, more than 100 B-29s attacked the Hitachi Works and its surroundings with one-ton bombs. On July 19 — the very next night after the naval bombardment — 127 B-29s of XXI Bomber Command dropped incendiary bombs that destroyed approximately 79% of the city's built-up area. The June 10 raid was the deadliest single attack, killing 634 employees at the Hitachi Works alone. Combined with the naval bombardment, the Hitachi campaign killed over 1,500 civilians and left the city in ruins.

The morning after the naval bombardment, an estimated 30,000 civilians were observed fleeing Hitachi for the countryside. The Tōrin Monument stands as a solemn reminder of these events and serves as the site for annual memorial services.