Hachioji manhole cover. It depicts a Sanbaso dancer (三番叟). Sanbaso is a well-known dancer in Noh and kabuki. He comes from a Noh prayer dance called Okina (翁) dating from the 14th century as a religious ritual.

Hachioji's manhole shows the Sanbaso as a Hachioji Kuruma Ningyo puppet (八王子車人形). It's a unique offshoot of bunraku puppetry performed by a troupe based in Hachioji.
Here's a video that shows exactly what it is: https://youtu.be/XV8gVw5Rhwg