When driving around, each on Shuto and on the common streets, attempt to avoid the push hour (with traffic shifting into the centre in the morning, and out in the direction of suburbs in the evening). Check with the car rental company whether or not English-language navigation system is on the market, as it’s going to make an enormous distinction, and you will be able to make use of your car to outperform the public transportation on many occasions. Tokyo is a gigantic warren of slender streets with no names, with typically gradual-shifting visitors and comparatively restricted and expensive parking.
Taxis are rather more handy if your budget permits it; walking or public transportation is far less expensive and given the difficulties of navigation and finding parking in popular areas, most likely simpler too. The price of dwelling in Tokyo isn’t as astronomical as it once was.