Although I wanted to bring this coin to a cache close to the Hakone Garden (for example "Trolls of Tollgate" GC1ERCC), I did not have the chance to travel in that direction in the last 4 weeks, so I thought that I will drop this coin if not in a Japanese-themed cache at least in a place that is frequented by Japanese mountain bikers. :)
I think this coin would really enjoy the Hakone Gardens, but from here it has also good chances to be picked up by somebody traveling to Japan.