Shousha Man no Isekai Survival: Zettai Hito to wa Tsurumanee  

Another World Survival of Trading Company Man, 商社マンの異世界サバイバル ～絶対人とはつるまねえ～

Keigo Okuda was a hardworking businessman who devoted all of his time and energy into his work until he won a large sum of money through the lottery. With his financial concerns now resolved, he decided to leave behind city life and move to the countryside in search of tranquility. However, as fate would have it, Keigo was suddenly transported to another world where he found himself unable to communicate with anyone else. Despite being a man in his forties who dislikes people, Keigo's merchant skills may prove useful in this new and unfamiliar environment. The story of his peaceful life begins here.