Cement in Japan: emitters, CO2 & carbon value

27 tracked facilities, ≈23,285,241 t CO2/yr combined — here are the largest, what that CO2 is worth at current prices, and the sector's reduction pathway. Full sector pathway: decarbonizing cement.

The numbers

Cement in Japan at a glance

Metric	Value	Note
Facilities tracked	27	with CO2 estimates
Total est. CO2	23,285,241 t/yr	Climate TRACE 2023
Average per facility	862,416 t/yr
Indicative carbon value	€1,755M/yr	at €75.36/t CBAM

Carbon pricing here: GX-ETS voluntary phase; mandatory from FY2026, carbon levy from 2028. Tokyo cap-and-trade exists locally. Current benchmark: no liquid market price. Full country page: carbon price in Japan.

Largest emitters

Top 10 cement CO2 emitters in Japan

#	Facility	Owner	t CO2/yr (est. 2023)	Indicative value
1	Mitsubishi Materials Kanda Cement Plant	Mitsubishi UBE Cement Corp	3,022,664	€227.8M
2	Sumitomo Osaka Cement Kochi Cement Plant	Sumitomo Osaka Cement Co Ltd	1,974,641	€148.8M
3	Ube Industries Isa Cement Plant	Mitsubishi UBE Cement Corp	1,793,454	€135.2M
4	Sumitomo Osaka Cement Ako Cement Plant	Sumitomo Osaka Cement Co Ltd	1,273,046	€95.9M
5	Tosoh Nanyo Cement Plant	Tosoh Corp	1,180,850	€89.0M
6	Aso Cement Kanda Cement Plant	ASO CEMENT Co Ltd	1,040,172	€78.4M
7	Ube Industries Ube Cement Plant	Mitsubishi UBE Cement Corp	956,906	€72.1M
8	Taiheiyo Cement Omi Cement Plant	Taiheiyo Cement Corp	934,377	€70.4M
9	Taiheiyo Cement Saitama Cement Plant	Taiheiyo Cement Corp	847,925	€63.9M
10	Taiheiyo Cement Kamiiso Cement Plant	Taiheiyo Cement Corp	843,082	€63.5M

Climate TRACE satellite estimates via IndustryAtlas — modelled, not verified; some entries aggregate clusters. Corrections welcome.

⬇ This table (CSV)🖨 PDF for management

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Same industry, other countries

Other industries in Japan

Iron & steel in Japan

101,717,091 t CO2/yr

Oil refining in Japan

26,447,233 t CO2/yr

Petrochemicals (steam cracking) in Japan

8,814,008 t CO2/yr

Pulp & paper in Japan

2,048,849 t CO2/yr

Chemicals in Japan

1,802,420 t CO2/yr

FAQ

Questions

How many cement facilities does Japan have with tracked emissions?

27 facilities carry satellite-based CO2 estimates in our dataset (Climate TRACE 2023), totalling ≈23,285,241 t CO2/yr.

What is the largest cement emitter in Japan?

Mitsubishi Materials Kanda Cement Plant — ≈3,022,664 t CO2/yr (est. 2023). Estimates are modelled, not verified declarations.

What would this CO2 cost at the CBAM price?

≈€1,755M per year at €75.36/t — indicative full-price value; actual cost depends on the EU-bound export share.

How this page is built: heat-loss figures follow ASTM C680 / ISO 12241 (the method behind our public calculators); facility emissions from Climate TRACE & EU ETS verified data across 30,000+ industrial sites; the 2026–2034 schedule is Regulation (EU) 2023/956, not a forecast. Published by Inzonex — manufacturer of modular removable insulation (UK Patent GB2508992.1). Spotted an error? Tell us — we correct on evidence.