When Chozen is leaving Kumiko a voicemail, he says the same line to her that Miyagi said to his old girlfriend Yukie in person, in The Karate Kid Part II (1986). The line is "I should have taken you with me".
In the limousine, Daniel, Johnny and Chozen are rocking out to the Survivor song 'Eye of the Tiger'. That song replaced the song 'You're the Best' in Rocky III (1982). The song 'You're the Best' then was used in The Karate Kid (1984) during the All-Valley tournament fight scenes.