Can I study in Japan with an American green card?

Yes, just apply for China nationality and get a Japanese study visa. You can't apply for exit at will like Americans.

The green card in the United States will be automatically cancelled after leaving the country for one year, so you should pay attention to the time of going back and forth to the United States.

A green card is a foreign citizen and enjoys the same treatment as a domestic citizen.

If you are not particularly talented in this field, it is not recommended that you learn, especially if you have no foundation. Japan's cutting-edge industries are the most competitive in the world. Many cartoonists barely have enough food and clothing. Of course, if you have money at home, you'd better do what you like.

There are also comics and computers. Manual Japanese is the best, and if you learn computer drawing, the United States is obviously a higher level. If you have seen EVA, modern abstract computer drawing (Apostle) may be the development direction of future animation.