In 2021, Japan's secondary economic sector had the most establishments in the ** industry. While over ** businesses were operating in construction, mining and quarrying of stone and gravel comprised less than  business establishments.
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Statistics Bureau of Japan. (September 19, 2025). Number of private business establishments operating in the secondary economic sector in Japan in 2021, by industry (in 1,000s) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 22, 2026, from /statistics/629523/japan-secondary-sector-establishment-numbers/
Statistics Bureau of Japan. "Number of private business establishments operating in the secondary economic sector in Japan in 2021, by industry (in 1,000s)." Chart. September 19, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 22, 2026. /statistics/629523/japan-secondary-sector-establishment-numbers/
Statistics Bureau of Japan. (2025). Number of private business establishments operating in the secondary economic sector in Japan in 2021, by industry (in 1,000s). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 22, 2026. /statistics/629523/japan-secondary-sector-establishment-numbers/
Statistics Bureau of Japan. "Number of Private Business Establishments Operating in The Secondary Economic Sector in Japan in 2021, by Industry (in 1,000s)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 19 Sep 2025, /statistics/629523/japan-secondary-sector-establishment-numbers/
Statistics Bureau of Japan, Number of private business establishments operating in the secondary economic sector in Japan in 2021, by industry (in 1,000s) ÌÇÐÄÆƽâ°æ, /statistics/629523/japan-secondary-sector-establishment-numbers/ (last visited July 22, 2026)
Number of private business establishments operating in the secondary economic sector in Japan in 2021, by industry (in 1,000s) [Graph], Statistics Bureau of Japan, September 19, 2025. [Online]. Available: /statistics/629523/japan-secondary-sector-establishment-numbers/
