They both involve time travel between eras and creating food! Chonmage Purina is a samurai who travels forward in time and makes his name by making pastries. Nobunaga No Chef travels back in time, leading to the character making dishes for a powerful daimyo named Nobunaga Oda.
Both movies are about cooking/baking. Both movies are very similar.......................................................................................................................................................................
Chonmage is another touching father and son story. Chonmage Purin tends to be more humorous and has a fantastical plot, while Like Father, Like Son takes a more somber approach to fatherhood and tends to be more realistic.