The cost of the trip is really cheap! You can experience both beautiful aquarium and old Okinawa cultures in this one day trip. This is a considerable course to bring your elder and younger family members to come. Foreigners can use the audio tour guide to know the local customs and stories of Okinawa (English, Chinese, Korean, Japanese) when you are on the bus. I was surprised about the good photoing technique, energetic guiding and well singing ability of the tour guide lady. Thank her so much. Besides, the strictly on time behavior of other Japanese travelers also surprised me. It is a cultural difference, and I respect their spirit very much. I have a lot of fun in this trip. I will joint the one day tour again the next time I visit Okinawa!!
Other points: If you want to experience the beautiful beach of Okinawa, I suggest you to joint other course, the 古宇利島 schedule won't fulfill your wish. It's hard to sleep on the bus because of the energetic guiding, so you need to have a good sleep night the day before.