This wall is located by Kannonji Temple. The history of temple itself is interesting and this wall is registered as "important asset".
This is in the small and no sign, but if you follow where people go, you can find it.
We walked by this very unusual wall on our way to Yanaka from Ueno Koen.
It was quite a surprise to come upon the wall along the sidewalk on a mostly residential street.
Only after we photographed it, and returned home, did we do research on what we saw. The Edo period "Tsuji-bei" wall is made of mud and tiles...