Police in Toyama Prefecture arrest a 53-year-old man over an alleged plan to carry out indiscriminate killing in Tokyo, according to reports. The suspect is held as investigators examine the circumstances surrounding the alleged plot. Police say the man broadly admits the allegations, without detailing additional specifics in the available reports. Authorities have not, in the provided summaries, released information on a motive, targets, timing, or any weapons linked to the case. The arrest is described as part of an ongoing investigation into potential threats to public safety. The reports indicate that the suspect faces legal proceedings related to the alleged plan, while investigators continue to gather evidence. No additional commentary or outcomes are included in the supplied information.