Fun Territory Defense by the Optimistic Lord

Read Manga Fun Territory Defense by the Optimistic Lord / Okiraku Ryoushu no Tanoshii Ryouchi Bouei ~Seisan-kei Majutsu de Na mo na Kimura wo Saikyou no Jousai Toshi ni~ / Easygoing Territory Defense by the Optimistic Lord: Production Magic Turns a Nameless Village into the Strongest Fortified City / お気楽領主の楽しい領地防衛～生産系魔術で名もなき村を最強の城塞都市に～

A man was reincarnated as Van, a boy of noble birth, who grew up to become a child prodigy through hard work. But when it was discovered that he possessed “production magic,” he was immediately relegated to a remote village. However, his magic, which was called useless, turned out to be truly extraordinary, capable of producing anything as long as he had the right ingredients! With the knowledge from his previous life and the overpowered magic, the small, poor village will grow to become into a great city.