Prime Minister Junichiro Koizumi will spend more than 11 hours in Pyongyang on Tuesday to hold landmark talks with North Korean leader Kim Jong Il, a Foreign Ministry official said Monday.

But how much time he actually spends with Kim during the one-day trip to the North Korean capital, or where the two will meet, is uncertain and will likely remain so until just prior to the start of the summit, the official said.

"We want to make the prime minister's visit as practical as possible," the official said. "But we do not yet know how the meeting will be held. We anticipate the summit talks will take up quite some time."