Notes : a - 4-chome 33-ban to 39-ban b - 1 , 2 , 3-chome , 4-chome 1-ban to 32-ban c - 1 , 2-chōme d - 3 , 4-chōme e - Major commercial and residential district located by the Tama River On April 25 , 2011 , amid national concern over the safety of nuclear power triggered by the March 11 earthquake and Fukushima I nuclear accidents , former Social Democratic Party Upper House House of Councillors legislator Nobuto Hosaka was elected mayor on an anti-nuclear platform . Prior to becoming mayor , Hosaka was also well known for his staunch opposition of the death penalty and his defense of Japan 's Otaku culture
March 11 earthquake
2011 Tōhoku earthquake and tsunami
Setagaya