Democratic Party of Japan lawmaker Katsuhito Yokokume gets at least 10 calls on his cell phone every day from the Naoto Kan and Ichiro Ozawa camps, asking for his support in Tuesday's party presidential election.

"I don't recognize some of the phone numbers that are appearing on my screen . . . so they must have a list of cell phone numbers they are calling," said Yokokume, who has yet to decide who he will vote for.

There is a big spotlight on rookie DPJ lawmakers like the 29-year-old Yokokume because they could be casting the crucial votes in the race to elect the party's leader and effectively the prime minister.