On 24 October 2011 a research group under professor Mitsuhisa Watanabe of Toyo University published a report that raised questions about the seismic safety of the plant-site. A number of faults are present under the complex and in this study it is unclear whether these faults might be active, as some experts noted recently in the NISA safety-screening process. In the study, the researchers said that certain characteristics are typical for the existence of active faults under the plant site, when they analyzed the surveys conducted by the two utilities for constructing the reactors there. Tohoku Electric and TEPCO, denied that there were active faults, and said that the faults were shaped by the swelling of water-bearing strata. Professor emeritus from Hiroshima University, who took part in the analysis, criticized the utilities for this denial. The new report might have an effect on the decision whether to resume operations of the reactor, and could also affect the earthquake-proof safety screenings of other nuclear plants.