By chance, Wataru discovers a gate that allows him to travel between another world and Japan, and makes a lot of money by bringing sugar and other things into the other world.
Other names:
異世界⇔地球間で個人貿易してみた, A Different World? Trading Between Worlds, Isekai ⇔ Chikyukan de Kojin Boeki Shite Mita
Author(s):
Hizen Fumitoshi