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.
History
Asahihama preserves part of the concrete coastal defense network built in eastern Hokkaido near the end of the Pacific War. Taiki's tourism account dates the accelerated construction to around 1944, when the Seventh Division moved its base to Obihiro, in preparation for an American invasion. The positions were not ultimately used in battle. Their firing openings and spacing help explain the intended defense of the shoreline.
A separate surviving example was rediscovered during forestry work in September 2008 and subsequently preserved by the town. It has an eight-sided plan, two firing openings and a bent entrance passage, interpreted as protection against blast. The town describes it as 3.5 metres high, with walls reaching 1.8 metres in thickness.
The beach structures and the forest example should not be confused: the former are affected by coastal erosion, and some are thought to have fallen from the terrace above. The map marks the tourism office's representative location for the group rather than every individual structure. Visitors can observe surviving concrete, openings and their relationship to the coast; internal access is not established here. The official guide warns that vehicles can become stuck in the beach sand.
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Sources
- 旭浜のトーチカ群Government大樹町観光WEB{"batch":"20261003","sourceNotes":"Supports WWII coastal defense context, approximate 1944 start, lack of combat use, erosion, visitor warning and representative Google Maps coordinate 42.434129,143.401312.","verification":{"coordinateSourceUrl":"https://visit-taiki.hokkaido.jp/sp_detail.php?id=39","coordinateEvidence":"Official tourism HTML GoogleMap link is //maps.google.com/maps?q=42.434129, 143.401312. Used as representative group point, not claimed to identify every pillbox or specifically the forest specimen.","accessCheckedAt":"2026-10-03","duplicateCheck":"Inventory has no Asahihama/旭浜/旭濱/Taiki/大樹 entry. Hokkaido records are other bases, memorials and industrial sites.","uncertainties":["Internal entry and site-by-site conditions are not confirmed.","1944 is approximate construction context for the group, not an individually dated structure."]}}
- 大樹町トーチカGovernment大樹町{"batch":"20261003","sourceNotes":"Updated 2025-04-09; supports 2008 discovery and town preservation, octagonal structure, dimensions, firing openings and interpreted blast-protection entrance.","verification":{"coordinateSourceUrl":"https://visit-taiki.hokkaido.jp/sp_detail.php?id=39","coordinateEvidence":"Official tourism HTML GoogleMap link is //maps.google.com/maps?q=42.434129, 143.401312. Used as representative group point, not claimed to identify every pillbox or specifically the forest specimen.","accessCheckedAt":"2026-10-03","duplicateCheck":"Inventory has no Asahihama/旭浜/旭濱/Taiki/大樹 entry. Hokkaido records are other bases, memorials and industrial sites.","uncertainties":["Internal entry and site-by-site conditions are not confirmed.","1944 is approximate construction context for the group, not an individually dated structure."]}}