At E3 2019 this year, I had the distinct honor of sitting down with Kazuki Hosokawa (producer for Judgment and Yakuza) from Ryu Ga Gotoku Studios and asking him about the future of the series and how each game gets made. As well as getting some insight into the development process, I learned that Hosokawa gets his best ideas while sitting in the bathtub. While he wouldn’t confirm if he sipped on champagne while doing so, I now like to believe he lives exactly like the characters he creates.
Source: Destructoid Yakuza director says his best ideas for the series start with him in a bathtub