We booked a tour of northern, central, and southern Okinawa, and also went snorkeling. I found the sunset kayaking tour to be the most worthwhile. Watching the sunset over the ocean was truly beautiful and an unforgettable experience. It's the most recommended activity from our 6-day trip. The staff spoke some basic English, and the kayaking instructions were quite simple and easy to understand with gestures. It was simple and fun. The instructor also helped take many photos and was very kind and enthusiastic. The instructor provided waterproof phone cases, but your pants will get wet, so remember to bring a change of clothes.