On May 16, 2011, we received an instruction* from Nuclear and Industrial
Safety Agency (NISA) of Ministry of Economy, Trade and Industry titled 
"Countermeasures based on a report on records of damage situation of power
facilities inside and outside of Fukushima Daiichi Nuclear Power Station 
(instruction)" 
                                    (Previously announced on May 17, 2011)

Thereafter we put together the contents in a report on the result of 
investigation of causes that brought about damage situation of power 
facilities inside and outside of Fukushima Daiichi Nuclear Power Station 
and those why protective devices of transmission lines worked and electric 
transmission was suspended (Countermeasures in the future are included in 
the result). We announced we submitted the report to NISA on May 23. 
                                    (Previously announced on May 24, 2011)

Subsequently, we have organized a report with the result of seismic 
analysis based on presumption of seismic waveform from data of observation 
points located near the power station about the causes that brought about 
damage situation of power facilities inside and outside of the Power 
Station. We announce we submitted the report to NISA today. 
                                                                       END

○ Attachment 
   ·English version of "Report on countermeasures based on a report on 
    records of damage situation to power facilities inside and outside 
    of Fukushima Daiichi Nuclear Power Station (instruction)" is now being
    developed. Due to the vast amount of data contained in the material,
    it will take a month before the whole translation is completed. We
    will post the translated material one by one when it is prepared. We
    apologize for the inconvenience caused.
     * At the moment, the whole data is prepared in Japanese at the page 
       of this link.

    
* Countermeasures based on a report on records of damage to power 
  facilities inside and outside of Fukushima Daiichi Nuclear Power 
  Station (NPS) (instruction)

                                              2011.05.16 NISA no. 7
Today on May 16, with regard to collection of a report pursuant to the
provisions of Article106, paragraph 3 of the Electricity Business Act 
(Act No. 170 of 1964), we received a report from your company on damage 
situation of power facilities, electric transmission to NPS and restoration 
situation of off-site power by urgent measures inside and outside of NPS 
since the occurrence of the Tohoku-Chihou-Taiheiyou-Oki Earthquake 
(Earthquake).
We, Nuclear and Industrial Safety Agency (NISA), determine we have to 
make clear causes that brought about damage situation of power facilities 
inside and outside of NPS in the report and those why protective device of 
transmission lines worked and electric transmission was suspended in order 
to utilize study to further enhance reliability of power supply to nuclear 
power stations.
Hence, we request that you report the following items to us by May 23, 
2011.

Required Items

1.Results of determination why the following items and other electric 
  facilities inside and outside of NPS have caused damage situation since 
  Earthquake occurred; especially, you should analyze whether damage 
  situation was caused by Earthquake or the tsunami by operation records 
  including those just after the earthquake occurred and accident records 
  in nuclear reactor facilities stipulated in paragraph 1 of Article 7 of 
  Order on Installation and Operation of Nuclear Reactors for Commercial 
  Power Generation (Order No.77 of Ministry of International Trade and 
  Industry of 1978) regarding the current accident at NPS in accordance 
  with the provisions of Article 67, paragraph 1 of Act on Regulation of 
  Nuclear Source Material, Nuclear Fuel Material and Reactors 
  (Act No. 166 of 1957) by records in the report and Nuclear No.1 on 
  April 24, 2011 dated on April 25, 2011.

 ○Fukushima Daiichi Nuclear Power Station
  ·Causes why power receiving circuit breakers and disconnecting switches 
   were damaged
  ·Causes of troubles on electric wires connecting Toden Genshiryoku Line
  ·Causes of collapse of a high tension tower of Yonomori Line No.27
  ·Causes why regular and emergent power distribution panels were damaged

 ○Shin Fukushima Electric Power Substation
 ·Causes why major transformers were damaged
 ·Causes why circuit breakers were damaged
 ·Causes why disconnecting switches were damaged
 ·Causes why instrument transformers were damaged
 ·Causes why current transformers were damaged

2.Results of determination why protective devices of the following 
  transmission lines worked and electric transmission was suspended
 ○Fukushima Daiichi Nuclear Power Station
 ·Okuma Line No.1
 ○Shin Fukushima Electric Power Substation
 ·Okuma Line No.2, 3 and 4
 ·Yonomori Line No. 1 and 2