Some of the delicacies of Nagano-ken:

Koi - Folks in Nagano sometimes like to eat carp. I realize once upon a time sources of fresh fish in Nagano were somewhat limited but, um no thanks. I've had it several times but it's never been tasty.

Basashi - No, not cherry tree flowers or leaves (it's sometimes called sakura niku) but rather horse meat. I guess it's not that exotic in some countries but being from the US, it was for me. I had it served shabu-shabu style at a ryokan near Suwa.

Inago - Grasshoppers. I've had them panfried in Nagano and as tskudani in Tokyo.

Hachinoko - I guess this is one of the more exotic ones for me - bee larvae. These were panfried with some soy sauce and then added to steamed rice. They are kind of sweet and pop in your mouth as you chew.