Konapun is a Japanese “process” or “fetish” involving the manufacture of tiny, inedible foodstuffs. Why? I suspect there is some otaku value in producing only the finest hamburgers and hot dogs out of a tiny, fake kitchen, but what the heck do I know. I’ve seen lots of stuff coming out of Japan that is much tamer than this.
You can pick up your own Konapun with these kits or you can, presumably, just make a real sandwich. The choice, as they say, is yours.