You can obtain the Takayuki Yagami side case in Chapter 10 by approaching Yagami Detective Agency. After the brief cutscene, open your phone to the Buzz Researcher and select the keywords “Yagami”, “Saw”, “Fraud” and “Threaten”. Next, make your way to the objective in the southern part of the Champion District to begin conducting interviews. When you get there, you’ll need to leave the area then return to it to trigger a cutscene. After the cutscene, head forward towards the old man and decide to check it out.
Next, you’ll have to slip past the triplets. To do this, equip a disguise. When the brief cutscene concludes, you’ll be transported to just outside of Bar Tender. Approach the bar to trigger yet another cutscene. You’ll then need to speak with Jo Masuda, who will be standing outside where you saw the police interacting with him.
Once in your office, examine the following:
- Potato chip bag on floor next to the chair
- Bottle on floor in front of desk
- Dish on coffee table
Break out your Detective Dog and follow the dog until a cutscene triggers, which leads to a fight. Defeat the 2 goons to complete the side case!