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 8th), 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 52.3KB) 
Appendix: Radioactivity density of seawater near the quay of Fukushima  
          Daiichi Nuclear Power Station (PDF 36.1KB)