Families of Japanese nationals abducted by North Korea decades ago said Wednesday they are hopeful the planned U.S.-North Korea summit will pave the way toward finally bringing home those taken.

With U.S. President Donald Trump saying he will "take it up" at his meeting with North Korean leader Kim Jong Un, the head of a group representing abductees' families, Shigeo Iizuka, 79, said he wants the American leader to make sure Pyongyang follows through.

"We want him to win a firm commitment that (Pyongyang) will return the victims to Japan," said Iizuka, whose sister Yaeko Taguchi has been recognized by the government as having been abducted by North Korea in 1978 at the age of 22. Iizuka added that he thinks the U.S. leader could offer Pyongyang something in return for such a commitment.