Doraemon (1979)

S1E12 Build Up Subway

Nobita and Doraemon decide to surprise Nobita's father for his birthday by constructing a subway line of their own. Tired of seeing him struggle with the packed public transportation, they employ a digging machine to create a private subway that will make his daily commute more enjoyable. With teamwork and creativity, they delve into an underground adventure, aiming to give Nobita's father a unique gift that will ease his travel woes.