2005
- December 21. 2005
- Osaka Gas to Study a Pipeline Extension
- December 08. 2005
- Signing of Heads of Agreement with Chevron Australia for the Purchase of LNG
- September 27. 2005
- Acquisition of a US IPP Holding Company
- June 07. 2005
- Osaka Gas to Participate in a Norwegian Oil and Gas Exploration /Production Project
- March 30. 2005
- Osaka Gas to Acquire Life-Environment Business of Takeda Pharmaceutical Company