Sponsored to US for 2 weeks, need to come back to Japan to finish my college, 2nd yea

[patdmai]

My uncle sponsored me to the US for 2 weeks, now I need to go back to Japan to finish my college, I am in 2nd year.
Do I need any VISA, or any document when I come back to the US?
Thank you so much for your help.

[inadmissible]

ESTA travel authorization is generally valid for two years. Reapply online if your current TA expires before your return

[patdmai]

Sponsored to US for 2 weeks, need to come back to Japan to finish my college, 2nd yea

ESTA travel authorization is generally valid for two years. Reapply online if your current TA expires before your return

I think I forgot to mention that my uncle sponsored my father as an immigrant, or a Green Card holder. As a son, I can live and work permanently in the United States as a lawful permanent resident.
However, I need to go back to Japan to finish my college, I am in 2nd year.
My question is that do I need any special permission when I finish my college, and come back to the US?
I am grateful for your answer.
Thank you

[inadmissible]

Apply for a re-entry permit if you plan to be away from the United States for more than a year. Use Form I-131