Japan

Top 12 largest Japanese Companies in the Utilities—Regulated Gas industry by Market Cap

This is the list of the largest public listed companies in the Utilities—Regulated Gas industry from Japan by market capitalization with links to their reference stock.

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Top Utilities—Regulated Gas Companies from Japan as of Jan. 01, 2026

Rank Company Market Cap (USD) Country Sector Industry
1 Tokyo Gas Co.,Ltd. $13.96 B Japan Japanese Utilities Japanese Utilities—Regulated Gas
2 Osaka Gas Co. Ltd $13.60 B Japan Japanese Utilities Japanese Utilities—Regulated Gas
3 Toho Gas Co. Ltd $2.91 B Japan Japanese Utilities Japanese Utilities—Regulated Gas
4 Nippon Gas Co. Ltd $2.11 B Japan Japanese Utilities Japanese Utilities—Regulated Gas
5 K&O Energy Group, Inc. $625.0 M Japan Japanese Utilities Japanese Utilities—Regulated Gas
6 Shizuoka Gas Co. Ltd $581.1 M Japan Japanese Utilities Japanese Utilities—Regulated Gas
7 Saibu Gas Co.,Ltd. $450.4 M Japan Japanese Utilities Japanese Utilities—Regulated Gas
8 Hokkaido Gas Co. Ltd $422.9 M Japan Japanese Utilities Japanese Utilities—Regulated Gas
9 Keiyo Gas Co. Ltd $239.0 M Japan Japanese Utilities Japanese Utilities—Regulated Gas
10 Hokuriku Gas Co.,Ltd. $108.4 M Japan Japanese Utilities Japanese Utilities—Regulated Gas
11 Toell Co.,Ltd. $99.2 M Japan Japanese Utilities Japanese Utilities—Regulated Gas
12 Daimaru Enawin Co. Ltd $73.9 M Japan Japanese Utilities Japanese Utilities—Regulated Gas

Top Utilities—Regulated Gas Companies from Japan as of Jan. 01, 2026

1. Tokyo Gas Co.,Ltd.

Company Profile: Tokyo Gas Co.,Ltd.
Market Cap (USD): $13.96 B
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

2. Osaka Gas Co. Ltd

Company Profile: Osaka Gas Co. Ltd
Market Cap (USD): $13.60 B
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

3. Toho Gas Co. Ltd

Company Profile: Toho Gas Co. Ltd
Market Cap (USD): $2.91 B
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

4. Nippon Gas Co. Ltd

Company Profile: Nippon Gas Co. Ltd
Market Cap (USD): $2.11 B
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

5. K&O Energy Group, Inc.

Company Profile: K&O Energy Group, Inc.
Market Cap (USD): $625.0 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

6. Shizuoka Gas Co. Ltd

Company Profile: Shizuoka Gas Co. Ltd
Market Cap (USD): $581.1 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

7. Saibu Gas Co.,Ltd.

Company Profile: Saibu Gas Co.,Ltd.
Market Cap (USD): $450.4 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

8. Hokkaido Gas Co. Ltd

Company Profile: Hokkaido Gas Co. Ltd
Market Cap (USD): $422.9 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

9. Keiyo Gas Co. Ltd

Company Profile: Keiyo Gas Co. Ltd
Market Cap (USD): $239.0 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

10. Hokuriku Gas Co.,Ltd.

Company Profile: Hokuriku Gas Co.,Ltd.
Market Cap (USD): $108.4 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

11. Toell Co.,Ltd.

Company Profile: Toell Co.,Ltd.
Market Cap (USD): $99.2 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

12. Daimaru Enawin Co. Ltd

Company Profile: Daimaru Enawin Co. Ltd
Market Cap (USD): $73.9 M
Country: Japan
Sector: Japanese Utilities
Industry: Japanese Utilities—Regulated Gas

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