All historic sites
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11 sites
Chitose Naval Air Base
千歳海軍航空基地
A major Imperial Japanese Navy air base in Hokkaido established in 1939, serving as the primary northern defense and Soviet surveillance station. The base housed the Chitose Naval Air Group and the 41st Naval Air Arsenal, with two runways and 53 aircraft shelters across 200 hectares. Now JASDF Chitose Air Base and adjacent New Chitose Airport.
Former 7th Division Headquarters Site (Hokuchin Memorial Museum)
旭川第七師団司令部跡（北鎮記念館）
Site of the Imperial Japanese Army 7th Division headquarters in Asahikawa, Hokkaido — the elite "Hokuchin" (Pacifier of the North) force responsible for the northern defense of Japan. Formed in 1896 from Tondenhei (soldier-farmer) units that had colonized Hokkaido, the 7th Division earned a fearsome reputation as one of the IJA's most battle-hardened formations. It fought at the Siege of Port Arthur and Battle of Mukden in the Russo-Japanese War (1904–05), suffered devastating losses at the Battles of Khalkhin Gol (Nomonhan Incident) against Soviet armour in 1939, and its North Sea Detachment seized Attu in June 1942, the island whose garrison was annihilated in May 1943 in the first Japanese "gyokusai" (honorable death) of the Pacific War. The Hokuchin Memorial Museum, established in 1963 adjacent to the JGSDF Camp Asahikawa, preserves approximately 2,500 artefacts spanning the Tondenhei era through the 7th Division's campaigns, including the relocated gate piers of the original 1902 headquarters building.
Hakodate Seikan Ferry Memorial Ship Mashu Maru
函館市青函連絡船記念館摩周丸
The former Seikan railway ferry Mashu Maru, which made her last crossing in 1988 and has been moored at Hakodate Port as a museum ship since 1991, now serves as a floating museum documenting the 80-year history of the Seikan ferry service, including the catastrophic July 1945 US air raids that destroyed the entire ferry fleet and severed Hokkaido from Honshu.
Japan Steel Works Muroran Plant
日本製鋼所室蘭製作所
Founded in 1907 with British capital from Vickers and Armstrong Whitworth, the Japan Steel Works Muroran Plant was Imperial Japan's premier heavy ordnance factory. It manufactured large-calibre gun barrels, including the 41 cm main guns of the battleship Mutsu; the often-repeated claim that it made the 46 cm guns of Yamato and Musashi is mistaken, as those were built at Kure Naval Arsenal. On July 15, 1945, a US Navy task unit of three Iowa-class battleships bombarded the plant with 860 sixteen-inch shells, killing over 400 people in Muroran.
Muroran Naval Bombardment Memorial
室蘭艦砲射撃跡
Memorial site at Muroran Hachiman Shrine commemorating the July 15, 1945 naval bombardment of Muroran by a US Navy task unit of three Iowa-class battleships. The bombardment targeted the Japan Steel Works and Wanishi Ironworks, firing 860 sixteen-inch shells that killed 485 people including 439 civilians and devastated much of the city. It was one of the few Allied naval bombardments of Hokkaido.
Seikan Ferry Wartime Disaster Site (Tsugaru Strait)
青函連絡船戦時遭難地（津軽海峡）
On July 14-15, 1945, US Navy Task Force 38 carrier aircraft attacked the Tsugaru Strait and destroyed virtually the entire Seikan ferry fleet — sinking or disabling all 12 operating ferries, killing over 400 crew and passengers, and severing Hokkaido's vital coal supply line to Honshu in one of the most strategically devastating air attacks of the Pacific War.
Wakkanai Naval Communications Base (Red Brick Communications Station)
旧海軍大湊通信隊稚内分遣隊幕別送信所（赤れんが通信所）
A former Imperial Japanese Navy communications base in Wakkanai, Hokkaido, established in 1931 as a transmitter station for northern defense. Directly linked to Navy General Headquarters, the station relayed the coded Pearl Harbor attack order "Niitakayama Nobore 1208" in December 1941, received General Kuribayashi's final message from Iwo Jima in March 1945, and remained in contact with the northern front through the end of the war. The distinctive red brick buildings, completed in 1941, were designated Wakkanai Municipal Cultural Properties in 2023.
Asahihama Coastal Pillboxes
旭浜のトーチカ群
Concrete coastal defenses built near the end of the Pacific War survive along Asahihama in Taiki. The group includes beach remains and a preserved pillbox discovered in a town-owned forest.
Cenotaph for Seikan Ferry Disaster Victims
青函連絡船海難者殉難碑
A cenotaph erected in August 1953 on the slopes of Mount Hakodate to memorialize the Seikan ferry crew members killed in the devastating US carrier air raids of July 14-15, 1945, which sank or disabled all 12 ferries operating between Aomori and Hakodate, severing Hokkaido's vital supply line to Honshu.
Kenebetsu No. 1 Airfield Covered Aircraft Shelter No. 1
旧陸軍計根別第一飛行場1号有蓋掩体
A surviving concrete aircraft shelter from the Army's Kenebetsu airfield complex, built around 1942–1943. It remains on private pasture in Betsukai and may not be entered or approached across the field.
Monument of the Nine Maidens
九人の乙女の碑
A memorial in Wakkanai Park commemorating nine young female telephone operators at the Maoka Post Office in Karafuto (southern Sakhalin), who took their own lives with potassium cyanide on August 20, 1945, rather than abandon their switchboards during the Soviet assault on Maoka. Their final transmission — "Everyone, this is the end. Goodbye, goodbye" — is inscribed on the monument. Erected in 1963, it stands as a symbol of civilian sacrifice in the closing days of the Pacific War.