Tokyo like all Japanese cities is an impossible maze of streets that ALL LOOK THE SAME. If your phone map works be sure and put down a marker for anyplace you want to return to. especially your hotel.
the subways are efficient, fast, crowded and go everywhere, if you can figure it out. I managed, so its doable. But its gonna take awhile to get your bearings and you may as well plan on getting lost down there. huge maze of everything.
https://theculturetrip.com/asia/japa...tles-in-japan/
a must see if u can.