Chin got really serious with Adam about his connections to the Yakuza.
If Adam wasn't able to make Chin understand why he was still meeting with a high-level Yakuza boss, Chin wasn't going to let Adam marry Kono. Chin even bought him a plane ticket back to Tokyo. Adam explained that his father's company started with financing from the Yakuza, and that he had to sever that connection the right way.
Sorry Chin, you spent $300 on a plane ticket for nothing.
Watch Hawaii Five-0 Fridays at 9/8c.