Tokuyama Complex | Overview
Overview
| Beginning of operation | 1957 |
|---|---|
| Number of employees | 564 (as of April 1, 2025) |
| Site area |
West District (former Refinery): 656,000 square meters East District (former factory) 432,000 square meters Oura area: 1,068,000 square meters |
| Contact us by phone |
Idemitsu Kosan Co.,Ltd. Tokuyama Complex Division Telephone number 0834-21-1100 Reception hours: 8:00-16:30 (excluding weekends, national holidays, the year-end and New Year holidays, and our company's anniversary) |
access
Address: 1-1 Shunan City, Yamaguchi Prefecture Yamaguchi Prefecture, 745-8613
[Directions to Tokuyama Complex main gate]
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Exit Tokuyama Station North Exit and turn right at the roundabout.
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Continue straight along Ginza Street (the arcade).
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Exit the arcade and continue straight. Turn right at the traffic light just past the FamilyMart, after crossing the Yangliu Bridge. (Approximately 700m from the arcade entrance to the traffic light)
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If you go straight along the river and cross the JR railway crossing, the main gate will be directly in front of you.
(Approximately 200m from the traffic light to the main gate, about a 15-minute walk from Tokuyama Station)
History
Former Refinery
| 1957 |
No. 1 atmospheric distillation device, vacuum distillation equipment, Completion of fluid catalytic cracking equipment |
|---|---|
| 1959 | Completed construction of the second atmospheric distillation unit and second kerosene and gas oil hydrodesulfurization unit. |
| 1960 | Completed construction of naphtha hydrodesulfurization equipment and second catalytic reforming equipment |
| 1972 | Completed construction of the third light and gas oil hydrodesulfurization equipment. |
| 1974 | Designated as a JIS certified factory |
| 1975 | Completed construction of vacuum gas oil desulfurization equipment |
| 1985 | MEK equipment completed |
| 1991 | Completed construction of the third catalytic reformer |
| 1995 | Acquired ISO9002 (all oil types) certification |
| 1996 |
Received TPM Excellence Award 1st category/ Acquired ISO14001 certification Completed construction of the 4th gas oil hydrodesulfurization unit |
| 1998 | Received TPM Excellence Continuation Award, Category 1 |
| 2003 | Acquired ISO9001 (all oil types) certification |
| 2004 | Merged with Idemitsu Petrochemical |
| 2007 | 50th anniversary of Refinery operation |
| 2014 | Crude oil processing function stopped (end of March) |
Former Tokuyama factory
| 1964 | First ethylene operation begins |
|---|---|
| 1965 | Unifiner 1st Sulfolane begins operation |
| 1967 |
Cyclohexane operation started 2nd sulfolane operation |
| 1968 |
polystyrene operation 2nd ethylene operation |
| 1970 |
Polybutene operation Styrene monomer operation |
| 1972 | IP SOLVENT |
| 1974 | No. 2 ethylene accident recovery and restart |
| 1978 | Start of comprehensive business inspection activities |
| 1982 | Suspension of styrene monomer and high deal |
| 1984 | Refinery and factory integration begins |
| 1985 | Liquid rubber operation/1st ethylene suspension |
| 1987 | Paraxylene operation |
| 1988 | Second ethylene capacity expansion |
| 1989 | No. 1 styrene monomer restarted |
| 1991 | Olefin processing equipment (No. 1 ethylene) restarted |
| 1992 | Secondary styrene monomer operation/ISO9002 (polystyrene) certification acquired |
| 1993 | TPM activity kick-off/hydrogenated petroleum resin operation |
| 1996 |
Acquired ISO9001 certification (all products) Acquired ISO14001 certification Winner of TPM Excellence Award, Category 1 |
| 1998 |
Polystyrene equipment suspended Received TPM Excellence Continuation Award, Category 1 |
| 2002 | Increased ethylene capacity (construction of new cracking furnace) |
| 2004 | Merged with Idemitsu Kosan |
| 2008 | Adamantane equipment commercial operation started |
| 2013 | Adamantane device abolished |
Tokuyama Complex
| 2014 | Tokuyama Complex opened |
|---|---|
| 2016 | Cumulative styrene monomer production reached 10 million tons |
| 2017 |
Achieved cumulative ethylene production of 20 million tons 60th anniversary of Idemitsu Tokuyama operation |
| 2018 | The former Refinery and the former Tokuyama Plant were integrated, and Tokuyama Complex obtained ISO 9001:2015 certification. |
| 2019 | Acquired high pressure gas specific certification (commonly known as super certification) operator certification. |
| 2020 | High-efficiency naphtha cracking furnace (R4 furnace) completed. |
| 2022 | Biomass power plant completed |
| 2023 | Hydrogenated petroleum resin manufacturing equipment shut down |
| 2024 | Boiler and other equipment open inspection cycle certification obtained for 12 years. |