Masatoshi Sugioka

Part of PT Medco Daya Abadi Lestari, INPEX Natuna, Ltd. engages in exploration, development, production and distribution of oil and natural gas in the South Sea. The company is based in Tokyo, Japan. INPEX Natuna was acquired by PT Medco Daya Sentosa from INPEX Corp. on May 31, 2017 for $167 million.

Part of INPEX Corp., INPEX North Caspian Sea Ltd. is a Japanese company founded in 2009 that aims to contribute to the world's energy demand by providing diverse energy more stably and efficiently. The company is based in Tokyo, Japan. The company's official website provides information about their international petroleum development, their history, and their commitment to contributing to the energy, environment, economic development, and social development that SDGs aims for. The website is available in both Japanese and English.

Teikoku Oil Co. Ltd. explores, develops, and supplies petroleum, natural gas, and other energy resources. The company's services include refining and processing of oil, natural gas, and chemical and petro-chemical industrial products. Its other activities include real estate rental and leasing, civil engineering, well-drilling works, passenger transportation, and warehousing. The company was founded on September 1, 1941 and is headquartered in Tokyo, Japan.