The yen was strong, but the development of the currencies is of course a bit different from my € point of view.
However, I disagree with „not as much inventory available“. I had the impression that the tsunami caused a huge dip in available inventory, which never was completely restored. There are only a few exceptions, which are better available today: H-5005, sakura archi, Sakura freematic come to my mind.
PS I have rarely bought a Japanese pencil from eBay (a few from Rohit back then and 2 from Elton recently, but I think that’s it), so here eBay is still not a good source for Japanese pencils for me.
Yes, of course there is USD to EUR as well. For a long time, EUR was a good 15 to 25% stronger, then dipped back to parity for a bit, then a bit stronger again.