North Korea's brinkmanship with the United States will not work and it will have to dismantle its nuclear development program due to its heavy dependence on outside energy and food, South Korea's Unification Minister Jeong Se Hyun said Friday.

Jeong, in Tokyo for a two-day visit, told the Foreign Correspondents' Club of Japan the situation is different from 1994, when Pyongyang was promised by the U.S. that it would get two light-water nuclear reactors and fuel oil in exchange for giving up its nuclear arms program.

"Now, they cannot use brinkmanship.