A report from a hotel guest that "I heard what sounded like a scam phone call" led to the arrest. Two suspects were arrested: Mikiya Yamamoto (29) and Keisuke Koike (24) A list of names and phone numbers of 300,2 people living in seven prefectures in the Kanto and Kyushu regions was found in the confiscated smartphones, and the police are investigating the repeated fraudulent calls based on these lists.
It means that they remain silent about the investigation.