Ko Watahiki is a 28-year-old professional football player from JPN. He currently plays for SC Sagamihara, wearing the number 2 shirt. He plays primarily as a Defender. He stands at 171cm tall and weighs 70kg. His preferred foot is Right.

His most recent move was a from Tegevajaro Miyazaki to SC Sagamihara on 2023-01-09.

Throughout the Japanese J3 League 2025, Ko Watahiki featured in 18 matches, averaging 1 tackles, 0.6 interceptions, and 3.1 clearances per game, while blocking 0.1 shots per game.