Idemitsu Kosan Tokuyama , Tokuyama — Japan

Idemitsu Kosan Tokuyama , Tokuyama is a petrochemical plant in Japan. Its listed capacity is 690,000 t of ethylene. Petrochemical plants crack hydrocarbons at very high temperatures to produce ethylene, propylene and other building-block chemicals — one of the most heat-intensive industrial processes. It is operated by Idemitsu Petrochemical. By capacity it ranks #2 among 12 petrochemical plants in Japan. It emits about 970,117 t CO₂e a year from Climate TRACE. That is 0.59% of the CO₂e from the 105 facilities in Japan that have an emissions figure in IndustryAtlas. Its CO₂ per unit of capacity is 8% above the national median for this sector.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-731951.

In context: how this facility compares

At 690,000 t of ethylene, Idemitsu Kosan Tokuyama , Tokuyama is well above the median petrochemical plant in Japan (493,000 t of ethylene). Subsector: petrochemical-steam-cracking. As petrochemical plant, it requires high process heat (typically 300–800°C) for its core industrial operations, supplied by boilers, furnaces or direct combustion. Petrochemical plants crack hydrocarbons at very high temperatures to produce ethylene, propylene and other building-block chemicals — one of the most heat-intensive industrial processes.

Capacity & CO₂-intensity comparison computed from Climate TRACE industrial facilities data; sector role based on engineering reference.

What 970,117 t CO₂e a year looks like

This facility's estimated annual CO₂e (Climate TRACE, modelled) in everyday equivalents from the US EPA Greenhouse Gas Equivalencies calculator:

Equivalencies: US EPA Greenhouse Gas Equivalencies. Emissions: Climate TRACE.

Capacity vs largest petrochemical plants in Japan

Listed capacity (t of ethylene), Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).

Operator

Operated by Idemitsu Petrochemical.

Local climate

Idemitsu Kosan Tokuyama , Tokuyama sits in a humid subtropical climate zone (Köppen Cfa), at 34.0°N in the northern hemisphere.

Köppen zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).

Site climate & environmental severity

This site sits in a corrosive environment (estimated ISO 9223 class C4 — High), with humidity / wetness the leading environmental stress.

In this site’s local climate, a bare 150 °C surface sheds about 1348 W/m² to ambient — roughly 1.04× the loss at a 20 °C reference. Reference-surface calculation at a 150 °C surface from WorldClim climate normals (ASTM C680 / ISO 12241) — an indicative per-climate comparison, not a measurement of this site’s specific equipment. Open method dataset: DOI 10.5281/zenodo.20787408 (CC BY 4.0).

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby sites

The #2 largest of 12 petrochemical plants in Japan by listed capacity (Climate TRACE).

Nearby industrial sites

• Idemitsu Kosan Tokuyama Refinery · Refinery · 179,808 t CO₂
• Nippon Stainless Steel Yamaguchi Works (Shunan Area) steel plant · Steel Plant · 191,744 t CO₂
• Tosoh Nanyo Cement Plant · Cement Plant · 1,180,850 t CO₂
• Nippon Stainless Steel Yamaguchi Works (Hikari Area) steel plant · Steel Plant · 97,836 t CO₂
• Tokuyama Soda Ash Facility · Chemical Plant · 39,686 t CO₂
• ENEOS Marifu Refinery · Refinery · 659,320 t CO₂

Location

Coordinates 34.04413, 131.8056. View on OpenStreetMap.

Frequently asked questions