Why did Otani bow deeply to Yamamoto continuously?

Ohtani and Yamamoto cooperated to contain the return training. Before that, Ohtani Xing asked Yamamoto to highlight his good feelings without being polite and respectful #大谷#大谷香平#shoheiohtani #山本#yamamotoyushin#dodgers #mlb #道奇#大谷综合#yoshinobuyamamoto