| Headquarters | OKAYA & CO., LTD. Nagoya city, JAPAN |
| Founded | 1669 |
| Network | 23 countries |
| Subsidiary | 75 companies |
| Employees | 6471 persons |
| Sales | 1,121.7 Billion JPY (FY2024) |
| Indonesia | PT. OKAYA INDONESIA (trading) PT. KOYO MARKETING & PROCESSING INDONESIA (trading) |
Siam Steel Service Center Public Company Limited (Thailand)
- 51/3 Moo 2 Poochaosamingprai Road, Bangyaprak, Samutprakarn 10130, Thailand.
- (+66) 385-9251-2
- (+66) 385-9253
- https://www.ssscth.com/
Siam Steel Service Center Public Company Limited (Thailand) Renovation
Contact Administration
Renovation Center
Siam Steel Vietnam Co., Ltd.
- KCN Phúc Điền, xã Cẩm Phúc, huyện Cẩm Giàng, Tỉnh Hải Dương, Việt Nam
- (+84) 961512866
- https://siamsteelvn.com/
Pebsteel Buildings Co.,Ltd.
- Unit 701, 7th Floor, Menas Mall Saigon Airport, 60A Truong Son Street, Tan Binh District, Ho Chi Minh City, 72108, Vietnam.
- https://pebsteel.com/
- (+84) 2838475475
PT. Okaya Indonesia
- Midplaza 2 Office Building, 24th floor Jl. Jendral Sudirman kav. 10-11, Jakarta 10220
- (+62) 21 571-9725
