If you have acquired a Japanese board, do not panic. The rules are 95% identical to the Monopoly you grew up with. Here are the specific tweaks for the (based on the official fan translation):
The Doraemon Monopoly English version includes:
If you are looking for modern Doraemon games available in English, Doraemon: Story of Seasons
The money uses Japanese Yen, but bills feature:
Imagine a world where instead of buying Boardwalk and Park Place, you are acquiring the Anywhere Door and Take-copter . Where instead of going to jail, you are sent to live with (Gian's little sister) for three turns. And where the Community Chest is replaced by a stack of Dokodemo Door wish cards.