A Japanese man drove a minivan directly into a crowd of pedestrians out for New Year's celebrations in what he said was retaliation for the "death penalty," police said.
Eight people were injured in the incident.
Police spokesman Satoshi Mishima said a 21-year-old man had been arrested, but said police were still investigating the precise motives behind the attack.
"I hit them with an intention to kill," Mishima said the suspect had told police. "I did that to retaliate against the death penalty."
Some media reports said the man had linked the attack to the executions in July of 13 members of the Aum Shinrikyo or Aum Supreme Truth cult, who were responsible for a 1995 sarin gas attack on the Tokyo subway.