This cherry blossom manhole is the most popular and common in Tokyo.
Bet you never noticed the Hachiko manhole, just by the Hachiko statue!
Lastly, the "Tricky manhole", along Dogenzaka. From this angle, it looks like a person running on the upper half, but look at it sideways, and you'll notice a dog pattern. Look even closer and you'll find one of the dogs has a collar - surely a Hachiko reference! (Hence: "Dog