The death toll from the series of quakes in the Chuetsu region of Niigata Prefecture increased to 31 as five more quake-related fatalities were confirmed Tuesday.
The victims were identified as Tomishichi Imai, 91, in the town of Koide, Haruo Nagumo, 81, in the city of Ojiya, Umeno Komagata, 68, in the town of Yamato, Shinjiro Takahashi, 73, and Hidesaku Ando, 59, from Nagaoka.
Imai died in a local hospital after falling unconscious at his home Monday morning. The four others died either from a heart attack or a brain hemorrhage.