This manhole cover seems not so New. But it's a manhole cover of Nakanoshima Kosoku Tetsudo Line. Not so old within 1 year. At the road near Watanabe-bashi bridge.
This can be find several place in Japan. So some Manholer introducethis at several place. This was on the way from Kamakura station to Hasedera temple in front of Memorium of Morihisa