Level 1 dakedo Unique Skill de Saikyou desu S01

Ryota Sato, a person who died from overwork at a black company, is reincarnated in another world. Although Ryota was revived, he is now faced with a new problem that prevents him from leveling up in the new world, keeping him at level 1. Despite being unable to level up, he possesses a unique skill that allows him to create cheat items that shouldn't exist in a world of monsters. With this knowledge, he maxes out his item creation skill and collects items and weapons that only he can use, making him the strongest despite being level 1.