A section of the stone wall at the national treasure Hikone Castle collapsed following heavy rainfall in July 2024 [1], [2].
The damage affects the Komekura sluice gate wall located at the western inner moat of the fortress. Because the site is designated as a national treasure, the structural integrity of its historical fortifications is critical for preservation and public safety.
Hikone City officials said the collapse occurred shortly after intense rains accompanying the typhoon season [1], [2]. The damage is attributed to the impact of Typhoons 7 and 8 [1].
Reports on the exact dimensions of the collapse vary between sources. One report states the affected area is 6.5 meters wide and 2.5 meters high [1]. Another report describes the section as approximately seven meters wide and 3.7 meters high [2].
City officials said that no injuries were reported as a result of the collapse [1], [2]. The event follows a pattern of weather-related instability at the site, as similar damage occurred during heavy rains in July of the previous year [1].
The Komekura sluice gate is a key component of the castle's water management and defense system. The collapse of such a structure requires specialized restoration to maintain the architectural authenticity of the Edo-period site.
“A section of the stone wall at the national treasure Hikone Castle collapsed following heavy rainfall.”
The recurring nature of these collapses—occurring in July for two consecutive years—suggests that the historical fortifications at Hikone Castle are increasingly vulnerable to the intensifying rainfall patterns associated with modern typhoon seasons. This may necessitate a shift from reactive repairs to more comprehensive structural reinforcements to protect the national treasure from climate-driven erosion.
