Japan

Top 4 largest Japanese Companies in the Oil & Gas E&P industry by Market Cap

This is the list of the largest public listed companies in the Oil & Gas E&P industry from Japan by market capitalization with links to their reference stock.

Japan Oil & Gas E&P Industry Analysis
Top Japanese Companies Japan Analysis
World Top Companies World Companies Analysis

Top Oil & Gas E&P Companies from Japan as of Jan. 01, 2026

Rank Company Market Cap (USD) Country Sector Industry
1 Mitsui & Co. Ltd $76.06 B Japan Japanese Energy Japanese Oil & Gas E&P
2 Inpex Corp $25.21 B Japan Japanese Energy Japanese Oil & Gas E&P
3 Japan Petroleum Exploration Co. Ltd $2.33 B Japan Japanese Energy Japanese Oil & Gas E&P
4 Fuji Oil Company Ltd $235.1 M Japan Japanese Energy Japanese Oil & Gas E&P

Top Oil & Gas E&P Companies from Japan as of Jan. 01, 2026

1. Mitsui & Co. Ltd

Company Profile: Mitsui & Co. Ltd
Market Cap (USD): $76.06 B
Country: Japan
Sector: Japanese Energy
Industry: Japanese Oil & Gas E&P

2. Inpex Corp

Company Profile: Inpex Corp
Market Cap (USD): $25.21 B
Country: Japan
Sector: Japanese Energy
Industry: Japanese Oil & Gas E&P

3. Japan Petroleum Exploration Co. Ltd

Company Profile: Japan Petroleum Exploration Co. Ltd
Market Cap (USD): $2.33 B
Country: Japan
Sector: Japanese Energy
Industry: Japanese Oil & Gas E&P

4. Fuji Oil Company Ltd

Company Profile: Fuji Oil Company Ltd
Market Cap (USD): $235.1 M
Country: Japan
Sector: Japanese Energy
Industry: Japanese Oil & Gas E&P

Stay in touch