The meeting place is Toei Oedo Line Ryogoku Sta. (E12) A3 Exit on the ground.
Please note that there are two Ryogoku Stations: Toei and JR. It should be Toei
but NOT JR.
https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line
The tour will end at the chanko-nabe restaurant.