On March 11, 2011, while Units 1 to 4 (Boiling Water Reactor Type, Rated 
Output: 1,100 MW) of Fukushima Daini Nuclear Power Station were during 
constant thermal output operation, at 2:48 pm, all Reactors automatically 
stopped due to Tohoku-Chihou Taiheiyo-Oki Earthquake (previously announced 
on March 11).

At 7:15 am on March 15, the reactor of Unit 4 achieved cold shutdown. As a 
result, all reactors of Units 1 to 4 at Fukushima Daini Nuclear Power 
Station achieved cold shutdown (previously announced on March 15).  

We reported the status of Fukushima Daini Nuclear Power Station affected by 
Tohoku-Chihou Taiheiyo-Oki Earthquake and subsequent Tsunami identified to 
date to Nuclear and Industrial Safety Agency, Ministry of Economy, Trade 
and Industry today.

•Appendix
The impact of Tohoku-Chihou Taiheiyo-Oki Earthquake to Nuclear Reactor 
Facilities at Fukushima Daini Nuclear Power Station