I went to the Okinawa in last january with my department friends. = I went to Okinawa with my friends/classmates last January. (13 people!)
We got there by plane. and We stayed in(at?) in  the hotel in Naha city for four days.
We rented three cars, and I drove a car. Driving in japan is = was very strange to me, because driving direction is opposite to Korea.
Meanwhile, we visited many tourist attractions. The best place which I visited (I have been visited?) = I have visited is the international street. There are = were many interesting things. so I was very interested.
Also, We drank beer in there = there. The beer is the best which I ever have been drunk = It was the best beer I've ever drunk. It was very delicious and cheap! We love = loved it so much. I stiil = still think about it's = its taste.
Therefore, I had a good time in Okinawa for four days. oh, we made a short movie in there. when I saw the short movie = whenever I see the short movie, I want to go there one more time.