
| 1965 | Feb. Apr. |
Founded in Himeji, Hyogo First emulsion factory established |
|---|---|---|
| 1966 | Jul. | Osaka Office opened. Emulsion export to Okinawa started. |
| 1969 | Feb. | Kumamoto Office & Factory established. |
| 1971 | Sep. | Wakayama Office & Factory established. |
| 1972 | Mar. Aug. |
Himeji Factory & Technical Research Institute established. Okinawa Office & Factory established. |
| 1973 | Mar. | Obtained ministerial approval for contractor-status. |
| 1980 | Nov. | Wakayama Mixture Plant & Himeji Mixture Plant established. |
| 1985 | Jan. | Amami Depot established. |
| 1987 | Dec. | Kumamoto Depot#1 established. |
| 1988 | Dec. | Himeji Depot established. Chartered asphalt ship put in service. |
| 1991 | Mar. Aug. |
Nagano Office opened. Recycle Station established in Himeji. Joetsu(Niigata) Depot & Factory established. |
| 1993 | Sep. | New Head Office Building completed in Himeji. |
| 1995 | Sep. Nov. |
Okinawa PMA Factory established. Himeji PMA Factory established. Kumamoto Recycle Station established. |
| 1997 | Jul. | Joetsu Petro Depot established. |
| 2000 | Aug. Sep. |
Joetsu Methanol Depot established. Kumamoto Depot#2 established. ISO9001 approved. |
| 2001 | Apr. | Shanghai(China) Office opened. |
| 2005 | Nov. | Osaka Depot established |
| 2009 | Jan. | Osaka PMA Factory established. |
| 2010 | Feb. | Ishigaki(Okinawa) Depot established. |