The parents of Megumi Yokota, one of the Japanese abducted by North Korean agents, are frustrated by the lack of progress over their daughter's return as Thursday marked 35 years since her disappearance.

"Thirty-five years is a long time. I've reached such an old age and am in a race against time," said Shigeru Yokota, who turned 80 on Wednesday.

"Every year, I'm saddened to see no progress," he said, holding a comb given to him by his daughter on Nov. 14, 1977, for his 45th birthday, the day before she was abducted on the way home from school at age 13.