Takuya Yokota chokes up as he talks about a photograph of his older sister, Megumi, whom he has not seen since she was abducted from a beach by North Korean agents one winter evening 41 years ago.
Megumi, 13 at the time, is one of scores Japan believes were snatched in the 1970s and 1980s to train spies.
Pyongyang has admitted to abducting 13 but says eight of them, including Megumi, taken as she walked home from school, are dead, although it gave Japan photographs from North Korea of her.