 In 2019, the rookie year, he finished the regular season with a 2–5 Win–loss record, a 4.14 ERA, 73 strikeouts in 58 2/3 innings, 26 Holds, and 8 saves.And he pitched as a Setup man against the Yomiuri Giants in the 2019 Japan Series.Kaino represented the Japan national baseball team at the 2018 USA VS Japan Collegiate All-Star Series, 2018 Haarlem Baseball Week and 2019 WBSC Premier12.