The Japan international shone at times during last term.
"Iâ€™m sure about that. Heâ€™s a clever player. Maybe itâ€™s always hard when you come over and itâ€™s been the first season for him. He is Japanese and played in Germany, where itâ€™s a completely different type of football. But heâ€™s a clever player and shows this in training," Rafael told manutd.com.