Ayaka Osajima is a 29-year-old professional football player from JPN. He currently plays for AC Nagano Parceiro Ladies, wearing the number 27 shirt. He plays primarily as a Defender. He stands at 164cm tall and weighs 55kg.

Throughout the Women Empowerment League 2025-2026, Ayaka Osajima featured in 16 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.