Tokyo power outage maps

Due to extreme impacts of earthquake and tsunami on the Japanese electrical energy grid, power companies in Japan are putting into place scheduled outages to reduce their energy load.


Nikkei: Tokyo Electric Power Co. (9501) and Tohoku Electric Power Co. (9506) will implement planned power cuts on a rolling basis .

Harvard: Japan Sendai Earthquake Data Portal. A team at the  Harvard Center for Geographic Analysis is collecting and publishing geospatial data about the earthquake.

"Illuminating Japan" weblog, Great Tohoku Earthquake.

The TEPCO web site is under extreme load, and is throwing error messages on the main page: "An error occurred while processing your request. Reference #97.1c1fac41.1300025768.58c0d00". Deeper links appear to be less affected. Here is from a TEPCO news release of 3/13; this is data that could be mapped.

[Blackout in TEPCO's Service Area]
Total of about 0.26 million households are out of power.
Tokyo: 0
Kanagawa Pref.: 0
Tochigi Pref.: 7,366
Chiba Pref.: 301
Saitama Pref: 0
Gunma Pref.: 0
Ibaraki Pref: 247,853
Yamanashi Pref: 0
Shizuoka Pref: 0 (east of Fuji River)
[Supply and Demand Status within TEPCO's Service Area to Secure Stable Power
Backup supply from Shinshinano Conversion Station: 600MW
Backup supply from Sakuma Conversion Station: 300MW
Backup supply from Higashi Shimizu Conversion Station: 100MW
Backup supply from Kitahon Interconnection Facility: 600MW


Schedule for Japan's Rolling Blackout. This unattributed PDF is all in Japanese, which I don't read; it appears to be a scan of a facsimile, and has all external indications of being genuine. The map below is excerpted from that original, and is from the TEPCO power service area. There is more excellent coverage (in Japanese) on Gigazine: 2011/03/13 Rolling Blackouts.

Teiden20110313-japan-blackout-mapThe same map, in color, from the Gigazine coverage above

Stop08_02The corresponding time scale, also from Gigazine:

An even better map, in full color, via


Japanese power grid, via Note that a portion of the Japanese grid is on 50hz, and another portion is on 60hz.

National Trunk Line Connections, from a map collected by GENI, undated.



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