On the first of this month, three consecutive slashing incidents occurred in Kawaguchi City and Yokohama City, Saitama Prefecture, and it was discovered that the corporate worker arrested within the Yokohama incident was suspected of being concerned within the Kawaguchi incident. It can also be deliberate to re-arrest him on suspicion of harm. According to police, he has denied the allegations to date.
Source
Company worker arrested for slashing in Yokohama Re-arrested on suspicion of being concerned in Kawaguchi’s case | NHK
