On 1 October 2008, at around 3 a.m., a fire broke out at an adult video arcade called Cats in the Nanba district of Osaka, Japan. The business rented out 32 small private rooms for approximately $15 (¥1500) a night, and the rooms — each equipped with a cot — were commonly used by customers as a cheap overnight lodging option. At the time the fire started, there were 26 customers and three employees inside the building.
The rooms were located along a narrow hallway with only a single exit through the reception area. The building had no sprinkler system or smoke ventilation. When the fire broke out, the arcade's manager turned off the fire alarm, believing it to be a false alarm, which delayed the response to the emergency. Approximately 120 firefighters responded to the blaze and extinguished it within 90 minutes.
Fifteen people died at the scene from carbon monoxide poisoning, and ten others were injured. One of the injured victims, Hirokatsu Igawa of Uda, Nara, later died on the morning of 14 October, also from carbon monoxide poisoning, bringing the total death toll to 16.
The perpetrator, Kazuhiro Ogawa, a 46-year-old Osaka man born in 1962, told police he had started the fire intending to commit suicide but became frightened and fled as smoke filled his room. Ogawa said he had been depressed, living on welfare, and believed his life "would be meaningless." Although he initially admitted to the allegations, Ogawa later pleaded not guilty at trial, stating "I did not commit arson" and claiming he had only admitted to arson because he thought the fire resulted from his own cigarette.
Ogawa was found guilty on 21 November 2009 and sentenced to death on 17 December 2009. The Osaka High Court upheld his death sentence in 2011. In 2014, Japan's Supreme Court rejected his appeal; Judge Tomoyuki Yokota stated that the "extremely large number of casualties is serious, and the impact and anxiety on society is great," and that there was "no reason to consider the motives and circumstances behind the decision to commit suicide." As of 2022, Ogawa remained on death row awaiting execution.