At around 9:30 am on April 2nd, we detected water containing radiation 
dose over 1,000 mSv/h in the pit* where power supply cables are stored 
near the intake channel of Unit 2. Furthermore, there was a crack of 
about 20 cm length on the concrete lateral of the pit, from where the 
water in the pit was out flowing. At around 0:20 pm on April 2nd, we 
reaffirmed the event at the scene.

We have implemented sampling of the water in the pit, together with the 
seawater in front of the bar screen near the pit. These samples were 
sent to Fukushima Daini Nuclear Power Station for analysis. (Reported on 
 April 2nd already)

At around 5:38 am on April 6th, we have observed stoppage of spilling of 
water from the crack on the concrete lateral of the pit. For the sake of 
completeness, we put further reinforcement for the stoppage of leakage 
and consider countermeasure including continuous injection of coagulant. 
We will also note the water level of turbine building of unit 2 remain 
unchanged. We will further investigate if there is any other leakage. 
(Reported on April 6th already)

We have been conducting sampling of seawater in front of the bar screen 
near the pit. In regard to the sample collected yesterday (April 9th), as
a result of conducting nuclide analysis, radioactive materials were 
detected as described in the exhibit. Accordingly, we have reported the 
result of analysis to Nuclear and Industrial Safety Agency and 
Fukushima Prefecture.

Regarding the results on three nuclides (iodine 131, cesium 134, cesium 
137), we would like to assume those as definite result, however, as for 
other nuclides, we will revaluate in accordance with the preventive 
measures formulated after being given warning from Nuclear and 
Industrial Safety Agency on April 1st.
 
* pit: a shaft made of concrete 

Appendix: The result of nuclide analysis of the seawater at the front of 
          shallow draft quay and the screens of Unit 2 and 4 of the 
          Fukushima Daiichi Nuclear Power Station (PDF 10.0KB) 
Appendix: Radioactivity density of seawater near the quay of Fukushima 
          Daiichi Nuclear Power Station (PDF 13.0KB)