In Yakuza: Like a Dragon, certified best boy Ichiban Kasuga can start the substory “Whispers of the Underworld” in Isezaki Ijincho during Chapter 9. To trigger the substory, Ichiban must have reached at least Confidence Lv. 4 in his personality stats, and he will need Confidence Lv. 7 in order to complete the substory. He also must visit the Kinka Bridge and unlock the Gambling Hall before he can speak with Iroha at Survive Bar to start the substory.