Overview

• The Metropolitan Police arrested 28-year-old Matsuoka Yuga on July 16 on suspicion of attempted arson at a go-kart management company in Koto Ward.
• Investigators say he ignited industrial waste in the facility at around 4:40 a.m. on June 21, scorching parts of three karts and the exterior wall of a neighboring warehouse.
• Matsuoka told police he carried out the attack because the go-kart engine noise was loud and caused him significant stress.
• Fire crews extinguished the blaze after approximately three hours, and there were no reported injuries from the incident.
• Authorities are probing an English-language letter delivered in early May that threatened to burn karts if engines ran again to determine its link to the arson attempt.