
I dunno about the tax thing, sounds sus.
I did some digging (hah), but it seems the laws vary from state to state and it can get kinda complicated. Generally you only qualify for the exemption if the property is used exclusively for the internment of dead bodies.
Butter corn miso ramen is a thing in Sapporo. Probably invented to promote regional products (Hokkaido is famous for corn and dairy) to tourists.