I've wondered about this for wasabi. I believe it is the most expensive vegetable on the market at several hundred dollars per kilo - almost all of what is sold

I've wondered about this for wasabi. I believe it is the most expensive vegetable on the market at several hundred dollars per kilo - almost all of what is sold as wasabi is actually horseradish. Apparently it is picky about conditions (as the price would suggest), and so I'd think it would be an interesting opportunity.