Another shop that modeller cannot miss is Lemon Gasui!
The shop is very close to Ochanomizu station (Chūō-Sōbu Line, JR East) , an area also famous for musical instrument shops.
Inside you can find everything for the fine arts (everything !!), materials for creating dioramas, structures, scenarios, etc ... the section of profiles / sheets in wood, metal and plastic is the best I have ever seen!
It's worth taking a look at it.