Boukyou Tarou

The advent of a great cold wave, devastating damage, and a world reset. After awakening from a 500-year-old artificial hibernation, Taro Maizuru realizes that he has lost everything he ever had, including his beloved family and his fortune. Crawling back from the depths of despair in pursuit of an ideal life and purpose, he leaves the distant land he is in, with his sights set on his homeland, Japan.

(Source: K Manga)