In connection with the incident at Fukushima Daiichi Nuclear Power Station 
caused by the tidal wave associated with Tohoku-Chihou-Taiheiyou-Oki 
Earthquake on March 11th, 2011, "Rules on the Installation and Operation 
of Commercial Power Reactors"was amended on March 30th. In parallel with 
amendment of this ministry ordinance, we received an order*1 from Minister 
of Economy, Trade and Industry to apply for approval of modification on 
safety regulations on nuclear reactor facilities. On April 8th 2011, we 
applied to Ministry of Economy, Trade and Industry for approval of 
modification on safety regulations on nuclear reactor facilities of 
Kashiwazaki-Kariwa Nuclear Power Station*2. 

Based on the requirement of ministry ordinance to improve system for 
maintaining reactor facilities under circumstances where tidal waves 
cause loss of function to all the facilities receiving alternating-current 
power, all the reactor cooling facilities utilizing seawater and all the 
facilities for spent fuel pool cooling ("Station Blackout"), we have set 
forth the follows.

- Allocate staff in order to maintain reactor facilities under Station 
  Blackout.
- Train staff who operate to maintain reactor facilities under Station 
  Blackout.
- Install power source cars, fire-fighting vehicles, fire fighting hoses 
  and other equipments necessary for operation to maintain reactor 
  facilities under Station Blackout.
                                 (Previously announced on April 8th, 2011)

Minister of economy, trade and industry gave us approval of modification 
on safety regulations on nuclear reactor facilities of Kashiwazaki-Kariwa 
Nuclear Power Station on May 6th, 2011.

Currently, we are working around the clock to bring the situation under 
control with support and cooperation from the society, related ministries 
and government offices and local governments.

Also we will further improve the safety measures against tidal waves in 
Kashiwazaki-Kariwa Nuclear Power Station on the process of analyzing and 
evaluating the circumstances of the accident hereafter.

Attachment: Comparison chart for amendment of Safety regulations on
            nuclear reactor facilities for Kashiwazaki-Kariwa Nuclear
            power Station(PDF 87.4KB)

*1: Details of the order from Minister of Economy, Trade and Industry
    are as follows.
    In order to prevent damage to reactor core and spent fuel, suppress 
    discharge of radioactive materials and restore cooling function of 
    reactor facilities under circumstances where 3 functions (all 
    functions regarding facilities receiving alternating-current power, 
    all function to cool reactor facilities by utilizing seawater and all 
    functions to cool spent fuel pool) are lost due to tidal wave, we 
    were ordered to take emergency safety measure and apply for approval 
    of modification on safety regulations in association with the 
    amendment of Rules on the Installation and Operation of Commercial 
    Power Reactors.

*2: Safety regulations on nuclear reactor facilities
    In accordance with Act on the Regulation of Nuclear Source Material, 
    Nuclear Fuel Material and Reactors, Paragraph 1, Article 37, the 
    business operator shall draw it up and apply for government's approval. 
    It provides overall operation on overall security activities in regard 
    to operation of power plant, fuel management and radiation dose 
    management.