Murayama (Izumi Sakuragi's old superior) and a park guard mention about Sakuragi (Aya Ueto) stepping on dog poop during the Chiyama attack investigation (Case 5). This is a humorous nod to Ueto's previous work in both Attention Please Specials (Honolulu and Sydney editions), when Ueto (as Yoko Misaki) stepped on a dog poop on the way to Tokyo-Narita International Airport in each of the specials.