Many a foｒeigner in Japan has discovered “yuzu Koshyo”/lime salt condiment, which is also produced in Shizuoka Prefecture and other places.
But have you heard of Yuzu Naban? It is a particularly useful mixture of lime and ground chili pepper. It accompanies well almost any “ethnic cuisine” as well as nabe/Japanes pot-au feu.
The bonus is that it does include any additives, but only natural spices!
This particular one is locally produced in Iawata City, although nt always easy to find away from Westen Shizuoka.
Shizuoka Ken, Iwata Gun, Sakuma-cho, Sakuma, 1689