Ossan Isekai de Saikyou ni Naru: Butsuri Tokka no Kakusei-sha

Former around-forty corporate slave salaryman Okuno Soushi is reincarnated into a somewhat game-like different world. At the same time, he seems to have "awakened," gaining the ability to use powerful "skills" that normal humans cannot. His chronic shoulder stiffness built up over years of overwork vanishes, and riding the wave of that emotion, he just keeps swinging weapons, training like crazy, piling up skills, and heading into dungeons Life in another world quickly feels natural to him. His growth curve, however, has one particular trait: all of his skills are heavily specialized in physical power!?