Hi, Sure, it's possible. As long as the periods of use do not overlap. However, using 2 passes brings up the risk that you are not breaking even on one or both passes, so make sure that you will get your money's worth before purchasing. Otherwise, you are just wasting money. Also you might be interested in a Shoryudo Highway Bus Ticket which might save you some money over 2 Takayama Horuriku passes. https://www.japan-guide.com/e/e2357_shoryudo.html
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Sure, it's possible. As long as the periods of use do not overlap.
However, using 2 passes brings up the risk that you are not breaking even on one or both passes, so make sure that you will get your money's worth before purchasing. Otherwise, you are just wasting money.
Also you might be interested in a Shoryudo Highway Bus Ticket which might save you some money over 2 Takayama Horuriku passes.
https://www.japan-guide.com/e/e2357_shoryudo.html