Top 50 Energies in Japan
This curated ranking covers the 50 largest energies in Japan, ordered by estimated audience size from Rascasse's anonymized search-behavior signals. Out of 96 energies tracked in Japan, the 50 ranked here account for the largest measured audience reach. E.ON, OVO and Duracell lead the list with a combined estimated audience of 467,207 people. Across all 50 entries the average audience size is 25,312, and the largest, E.ON, reaches around 206,901 people in Japan. Audience size is the estimated number of unique people in Japan who actively engage with each energy, derived from search demand signals. Rankings reflect search-behavior signals collected across Japan and are refreshed weekly.
Ranking
| Rank | Name | Audience size | Country share | Subtype | Category |
|---|---|---|---|---|---|
| 1 |  E.ON |
206,901 | 1.8% | Energy | Home & Garden |
| 2 |  OVO |
137,033 | 2.7% | Energy | Home & Garden |
| 3 |  Duracell |
123,273 | 3.9% | Energy | Home & Garden |
| 4 |  Chevron Corporation |
107,596 | 0.6% | Energy | Home & Garden |
| 5 |  Octupus Energy |
79,001 | 0.4% | Energy | Business & Career |
| 6 |  Erg |
72,237 | 10.9% | Energy | Home & Garden |
| 7 |  Gazprom |
71,890 | 5.1% | Energy | Home & Garden |
| 8 |  Octopus Energy |
61,043 | 0.3% | Energy | Home & Garden |
| 9 |  A2A |
59,097 | 2.0% | Energy | Home & Garden |
| 10 |  RWE |
43,905 | 1.9% | Energy | Home & Garden |
| 11 |  Enel |
32,380 | 0.1% | Energy | Home & Garden |
| 12 |  Ovo Energy |
30,960 | 0.6% | Energy | Home & Garden |
| 13 |  Energizer |
26,101 | 1.5% | Energy | Home & Garden |
| 14 |  EDF Energy |
22,546 | 1.1% | Energy | Home & Garden |
| 15 |  Engie |
20,623 | 0.1% | Energy | Home & Garden |
| 16 |  SWB |
15,771 | 2.6% | Energy | Home & Garden |
| 17 |  Ørsted |
14,169 | 1.2% | Energy | Home & Garden |
| 18 |  Eneco |
13,317 | 0.4% | Energy | Home & Garden |
| 19 |  Origin Energy |
12,020 | 0.6% | Energy | Home & Garden |
| 20 |  Estra |
11,840 | 1.4% | Energy | Home & Garden |
| 21 |  Equinor |
11,780 | 1.3% | Energy | Home & Garden |
| 22 |  AGL Energy |
11,700 | 1.9% | Energy | Home & Garden |
| 23 |  Iberdrola |
10,229 | 0.1% | Energy | Home & Garden |
| 24 |  Vattenfall |
8,272 | 0.1% | Energy | Home & Garden |
| 25 |  British Gas |
7,260 | 0.1% | Energy | Home & Garden |
| 26 |  Terna |
5,389 | 0.7% | Energy | Home & Garden |
| 27 |  Xcel Energy |
5,045 | 0.1% | Energy | Home & Garden |
| 28 |  EnergyAustralia |
3,869 | 0.2% | Energy | Home & Garden |
| 29 |  Uniper |
3,804 | 0.8% | Energy | Home & Garden |
| 30 |  Eskom |
3,366 | 0.2% | Energy | Home & Garden |
| 31 |  Centrica |
3,226 | 1.1% | Energy | Home & Garden |
| 32 | Good Energy |
3,111 | 0.9% | Energy | Home & Garden |
| 33 |  Enel X |
3,020 | 0.7% | Energy | Home & Garden |
| 34 |  EnBW |
3,003 | 0.2% | Energy | Home & Garden |
| 35 |  Essent |
2,610 | 0.1% | Energy | Home & Garden |
| 36 |  Enedis |
2,334 | 0.0% | Energy | Home & Garden |
| 37 |  Statkraft |
1,962 | 0.9% | Energy | Home & Garden |
| 38 |  Repower |
1,875 | 0.7% | Energy | Home & Garden |
| 39 |  Gewiss |
1,756 | 0.4% | Energy | Home & Garden |
| 40 |  Électricité de France |
1,488 | 0.1% | Energy | Home & Garden |
| 41 |  Antora Energy |
1,311 | 2.5% | Energy | Home & Garden |
| 42 |  SSE plc |
1,272 | 0.4% | Energy | Home & Garden |
| 43 |  Direct Energy |
965 | 0.1% | Energy | Home & Garden |
| 44 |  Verbund AG |
908 | 1.6% | Energy | Home & Garden |
| 45 |  Eni Plenitude |
901 | 0.0% | Energy | Home & Garden |
| 46 |  Kerala State Electricity Board |
773 | 0.1% | Energy | Home & Garden |
| 47 |  Wien Energie |
720 | 0.0% | Energy | Home & Garden |
| 48 |  Ecotricity |
697 | 0.3% | Energy | Home & Garden |
| 49 |  Ambit Energy |
658 | 0.1% | Energy | Home & Garden |
| 50 |  SMA Solar Technology |
610 | 0.8% | Energy | Home & Garden |
Frequently asked questions
How is this Top 50 list compiled?
Rascasse aggregates anonymized search-behavior signals across Japan and ranks each energy by its estimated audience size. Only entries with at least 5 measured entities are listed.
How often is the list updated?
The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.
What is the largest energy in Japan?
E.ON currently leads with an estimated audience of 206,901 people in Japan.
Methodology
Audience sizes are estimated from anonymized search-behavior signals across Japan. Lists below 5 entries are not published. See methodology for full details.