Japan Energy Development Co.Ltd. Japan

www.j-energy.co.jp

The company's Nakajo Gas Field was established in 1956. A gas dissolved in water reservoir was discovered in 1957, followed by the discovery of a gas-condensate reservoir in 1961. An oil reservoir was also discovered in 1978.

It has been producing natural gas since 1958. Iodine, which is an essential chemical element for humans, is also recovered from the associated water and supplied for medical purposes and for chemical materials.