Is Todoroki Valley worth it?

Don't drive in Tokyo: rail and subway reach every central sight faster, and parking is scarce and costly with no free street parking. A rental car only makes sense for day trips such as Mt Fuji's Fuji Five Lakes, Hakone or Nikkō — and even there trains and buses usually work.

• No free street parking — use coin parking or garages. Parking on Tokyo streets is not allowed except in marked on-street bays with a single-space parking meter or a pay-and-display ticket machine. Pay up front (meters take ¥100 coins; ticket machines take ¥1,000 notes, ¥500 and ¥100 coins), display the ticket on the windscreen, park inside the lines and leave before the time limit — overstaying or a missing ticket is treated as illegal parking. Everywhere else, use private 'coin parking' lots (Times, Repark, NPC24H etc.: a flap locks under the car until you pay at the machine) or building garages, which charge by the 15–30 minutes and are expensive in central wards. keishicho.metro.tokyo.lg.jp
• International Driving Permit (1949 Geneva only). Visitors can drive only with an International Driving Permit issued under the 1949 Geneva Convention (IDPs under the 1968 Vienna Convention are not valid), or — for licences from Switzerland, Germany, France, Belgium, Monaco and Taiwan — the home licence plus an official Japanese translation. Either is usable for at most one year from entry; carry your passport too. english.jaf.or.jp