We stayed in Onna village last year and enjoyed this beach, the snorkelling and banana boat experience. We came back to this beach even though we were staying 50 minutes North by car in Motobu, because there are so many fish and the water is so clear. The larger bay at Motobu allowed sand to be swirlled up by the wind, I think, but the bay here is protected by Manzamo and another peninsula so the water is much clearer. That said, the small cordoned off beach area here, with lifeguard is just boring sand. You still have to venture out at least 50 metres to see fish and coral, which I did on my own from the port side of the rocks enclosing the south side of the lifeguard protected beach. With no lifeguard to protect me, I wear swim shoes, a wetsuit and a self-inflating waist-mounted personal flotation device from aliexpress. No one else ventures out alone it seems, and there are dangers, but if you do, it is like swimming in a crystal clear aquarium with loads of colourful fish. The restaurant above the marine sports place is very good and not all that expensive too. I had the tofu soup with rice and a little sushi for 900 yen. My wife had a mini lobster or giant prawn lunch for 1700 yen. The photo was taken from the restaurant. The banana boat and snorkelling experience is very good but a bit pricey (8000 per person)so I would not have done it if I were not with my children.