Thanks LapLap for the bus info. I'll probable just pay as you go for the random bus trip when needed. And the local area buses sound 'cute' !!!

A related question. RUSH HOUR. I made the mistake 1 time using the subway about 9 am going towards central Tokyo. Never again. When is it reasonable to take the subway in the morning? I took the Ginza line 1 time about 7:30 am and not bad at all. Is the evening rush hour just as bad? In pre-Covid times in DC, reverse commuting was much less crowded compared to regular commuting.