Join Date: Dec 2004
Location: Riding the rails
Programs: Japan Forum, Skyteam Elite Plus, BW Diamond Select, HHonors Gold, NWA, DL, NH
Posts: 1,936
All lines can be busy at peak hours, for me there's no real difference, Metro, JR or other company. Tokyo Metro lines can be just as overcrowded as JR lines. Just depends on the routes, and times.