Grand Dwarf: Machikou Shokunin, Takumi no Waza de Isekai Musou

For 52 years, Takumi Fujimura, a craftsman who has continued to hone his skills at a town factory, finds himself in a predicament when he has a dispute with a client and stops getting loans from banks. After many years of hard work, he finally collapses, but he awakens in a different world where he meets Frau, a girl who aspires to become a hero.

(Source: Shueisha, translated)