Event organizer "Running Into The Sun" said the original plan was for Kim to high-five 500 fans selected from the audience but Kim was insisting on high-fiving everyone.
"I know it's not going to be easy and I hope that even if it is a really short moment of high-five, the fans would know how much I appreciate their effort and support," he said.
He will meet his fans at the stadium exit after the event ends.
Kim told The Associated Press on Thursday he's confident security won't be an issue.
The tour that starts Friday includes Hong Kong, Taiwan, China and Thailand. Organizers say Kim will high-five everyone at fan events in Hong Kong and Taiwan, too.
Kim is part of the boy band SS501 and became hugely popular across Asia after appearing in the 2009 Korean TV drama "Boys Over Flowers."
His solo debut album, "Break Down," was released in 2011.