His home was in Tsushima District of Namie-machi, northwest of Fukushima I Nuclear Power Plant.
If you haven't read it, Asahi Shinbun's "Trap of Prometheus" Series 1 was about Tsushima District. That's where people from other parts of Namie-machi that are closer to the plant as well as from other towns and cities escaped to, not knowing the radiation was extremely high in Tsushima, exceeding 100 microsieverts/hour. The government knew, because it had SPEEDI simulation results and it actually sent an official there to measure the radiation levels. But it decided to keep quiet. (You can read the whole series here, as per my translation.)
Fukushima Minyu (12/16/2011) reports:
It has been disclosed that a man in his fifties were found dead earlier this month in his home in Tsushima District in Namie-machi, which is designated as "planned evacuation zone" after the Fukushima I Nuclear Power Plant accident. The man had come back from his temporary stay in Fukushima City where he had evacuated. According to the Futaba Police Department, the death is considered suicide.
According to the Police, he must have used a kitchen knife at home and stabbed himself in the stomach. There was no suicide note left. The man was staying at his relative's house in Fukushima City, but he left, saying he was going to take a look at his home. When he didn't come back, the relative visited his home in Tsushima, and found him dead.