Police in Ninohe, Iwate Prefecture, said Saturday they have arrested an 86-year-old man on suspicion of killing his 87-year-old wife at their home. Police said Shinpei Hatakeyama has admitted to strangling his wife Kazuko at around 7:25 a.m. on Friday, Kyodo News reported. Hatakeyama called 110 at 7:30 a.m. and…