Japanese media, including at least NHK and the Daily Yomiuri, have reported that an analysis for TEPCO had predicted the possibility of a 10-metre tsunami at Fukushima Daiichi and Daini in 2008, but TEPCO did not act to improve defences. In late August, TEPCO defended its position. "Our position is that the trial analysis was conducted voluntarily by assuming severe conditions without reasonable wave source models," a spokesman said. A 2008 trial analysis using the 1896 Meiji-Sanriku tsunami was based on a hypothetical model that did not include a wave source model for the Fukushima prefecture's Japan trench line, since tsunami had not happened there before, TEPCO said.
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