日本原子力研究開発機構
On 17 July 2013 a commission of five experts led by NRA commissioner Kunihiko Shimazaki started the investigations on the geological activity of 8 zones of crushed rock under the reactor. Whether these old faults could move in conjunction with the active fault situated half a kilometer from the reactor site, and would constitute a hazard for the reactor safety. One of the experts, Chiba University professor Takahiro Miyauchi, did not take part in the two-day survey, but would visit the site afterwards. On Thursday 18 July Kunihiko Shimazaki told reporters, that his team could not yet reach a conclusion, further research was needed. Another acoustic survey of the grounds was planned by Japan Atomic Energy Agency and a geological examination to determine the age of the clay and stones in the faults. This could take a couple of months to finish, The assessment was planned at the end of August 2013.