Question: Who is recognized as a hero for his actions in the aftermath of a megathrust earthquake off the coast of Japan that occurred at 14:46 JST (05:46 UTC) on Friday 11 March 2011?
Sentence (from "2011 Tōhoku earthquake and tsunami"): The earthquake triggered powerful tsunami waves that reached heights of up to 40.5 m in Miyako in Tōhoku's Iwate Prefecture, and which, in the Sendai area, traveled up to 10 km inland.
Relevant evidence: No