If you're on a bike though, you can park on the sidewalk or almost anywhere else. Just look to see where other bikes are parked. Helmets are required. An international licence is almost ticket-proof, but if you do get caught speeding, it's pricey. Splitting lanes is common.
Motorcycles can ride up to the front of the queue at stop lights.
Be careful stopping for amber lights. Most Japanese don't so always check your mirrors. Helmets in large sizes are hard to find. Even if you do find a larger size, the shape might be different from the models sold overseas.