Hi Daniel-San,
I totally blur regarding which line that covered by JR pass in Tokyo, I only see your answer mostly saying “JR Yamanote loop line, JR Chuo central line and many more”. I read info frim wiki regarding JR east line and come up with lots of lines (https://en.m.wikipedia.org/wiki/List_of_East_Japan_Railway_Company_stations)
Question is, is it correct that the line in above wiki link all covered by JR Pass ?
Thanks