Ahoy! I've a few thoughts about doing maintenance to that quest. Here they are.
1. While talking to Kenji Kanno, the camera should focus on him while he says his line, "Can you help me? I joined a game of friendly mahjong, but some untrustworthy Yakooza decided to cheat, and they robbed me!".
2. Once reaching Kenji Kanno's destination the second he fled, Bonnie Anne and Ratbeard should appear, & the camera should focus on them while Bonnie Anne says her line, "Where'd he go? He must have suspected we'd come back knowing he'd tricked us.".
Those are the only thoughts about doing maintenance to that quest. Plus, the word, "mah jong", should be bridged together into "mahjong". Extra small text error report. Needs fixing.