Street Go-Kart (costumed) is a real time commitment — fit it in only if it's a priority.
Allow 2–3 hrs.
Buzzing through Shibuya and over Rainbow Bridge in a costume as cars and tourists wave at you is genuinely exhilarating and unlike anything at home. The catches are real: you need a valid International Driving Permit, you're in live traffic (exhaust, weather, some risk), and it's pure novelty, not a 'see Tokyo' tour.