According to the USGS/NEIC on-line Earthquake Search in the first half of 2011 the following earthquakes may qualify as from the M8.0+ and M7.5+ ranges -

2011/03/11 05:46:24 38.297 142.373  29    mb7.2 Ms8.3 9.00MWUCMT 9.00MWWCMT

2011/03/11 06:15:41 36.271 141.107  48    mb6.8  -    7.90MWUCMT 7.90MWGCMT

2011/03/11 06:25:50 38.058 144.590  18    mb7.1  -    7.70MWUCMT 7.60MWGCMT

According to “The 2011a Update of the M8-MSc predictions” (sent on Saturday, January 29, 2011) none of them hit the area of TIPs. The first one, i.e. the mega-thrust on 11 March 2011 off the Pacific coast of Tohoku Region (Japan), completed the case-history of the TIP in Japan on the 70th day after it was formally called off (http://www.mitp.ru/en/predictions/20110311.html). The other two are evident aftershocks of the first.