Class 1 to 3 regular warehouses belong to the category of regular warehouses and are legally defined in terms of safety feature requirements, descending from one to three. Nonetheless, all three kinds of facilities share some basic standards, e.g., minimum structural integrity.
In 2024, the area of class 1 to 3 regular warehouses in Japan reached a decade high of approximately million square meters, increasing from around million square meters in 2015. Increasingly popular self-storage units, known as 'trunk rooms' in Japan, often fall within this category since many conform to these standards.
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MLIT (Japan). (April 18, 2025). Area of class 1 to 3 regular warehouses in Japan from 2015 to 2024 (in million square meters) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 19, 2026, from /statistics/1220993/japan-regular-warehouse-area/
MLIT (Japan). "Area of class 1 to 3 regular warehouses in Japan from 2015 to 2024 (in million square meters)." Chart. April 18, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 19, 2026. /statistics/1220993/japan-regular-warehouse-area/
MLIT (Japan). (2025). Area of class 1 to 3 regular warehouses in Japan from 2015 to 2024 (in million square meters). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 19, 2026. /statistics/1220993/japan-regular-warehouse-area/
MLIT (Japan). "Area of Class 1 to 3 Regular Warehouses in Japan from 2015 to 2024 (in Million Square Meters)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 18 Apr 2025, /statistics/1220993/japan-regular-warehouse-area/
MLIT (Japan), Area of class 1 to 3 regular warehouses in Japan from 2015 to 2024 (in million square meters) ÌÇÐÄÆƽâ°æ, /statistics/1220993/japan-regular-warehouse-area/ (last visited July 19, 2026)
Area of class 1 to 3 regular warehouses in Japan from 2015 to 2024 (in million square meters) [Graph], MLIT (Japan), April 18, 2025. [Online]. Available: /statistics/1220993/japan-regular-warehouse-area/
