Ashiya(芦屋) City is part of Hyogo Prefecture and is located between Osaka and Kobe.
I found these manhole covers last year and feature it in this post but I feel like posting them in a separate, dedicated post just for it :).
The Kanji(Japanese Characters) indicated 雨水 or Rain Water. The design depicts the Azalea , the city’s flower symbol.
This one I am a bit doubtful. It does not look like a tree, it looks more like a boat in the water. I found this near the Marina so I guess it it same to assume that this maybe different kind of boats in the Marina.