1. Driving is on the left and the lanes are narrow. UK visitors will have no problem; Americans will find it trickier.
2. Japanese police have zero tolerance and complete discretion w.r.t. driving under the influence. Just don't do it; drinking even one beer and then driving is enough to get thrown in jail. And you do not want to get thrown in jail in Japan.
1. Driving is on the left and the lanes are narrow. UK visitors will have no problem; Americans will find it trickier.
2. Japanese police have zero tolerance and complete discretion w.r.t. driving under the influence. Just don't do it; drinking even one beer and then driving is enough to get thrown in jail. And you do not want to get thrown in jail in Japan.