You cannot live in Tokyo without a map.
Tokyo addresses are organized in descending order by To, Ku, neighborhood, Chome, block and finally building number. For example, here is the address of the Diet:
Tokyo-to
Chiyoda-ku, Nagatacho 1-7-1
If you have an address and a map, you can find any place in the city. If you have an address and a vague idea where your destination is, you may find yourself wandering for hours.
When someone invites you to her house, she either gives you a map or offer to meet you at the station. When you go out to dinner with a group from work, you get a map to the restaurant. Maps are even printed on store flyers and business cards!
