I got a three-year visa to Japan in Ctrip. How did I know this visa after I came back from Okinawa?

I just got a three-year multiple-entry visa to Okinawa, Japan, and signed it through Ctrip. Mainly for future work.

Now I am also studying how to complete this first trip to Okinawa. A long time ago, I went to Okinawa three times. . .

The problem is that if two people go together, fighting for a room won't save much money, because there are many single rooms in the hotel, so staying in a better hotel may save some money.