It is called "The Hidden Beach" because it's usually under the water and rises to the surface only at the ebb of a spring tide. It's located off the coast of Kise, Kasari-Town. The beach can be seen most of the time for three days around the new moon and full moon, from April until August or September. It is exposed above sea level no longer than two hours.
On a fine day last year, at the ebb of a spring tide, I waded to the emerged beach. The view of the newborn white sand was so touching that I hesitated to leave my footprints in it. So I just walked around the beach taking pictures.
The best way to get there is by wading, but the lower half of your body is sure to get soaked. You will be able to get there in 7 or 8 minutes from the closest point on the beach of Kise, yet you have to be careful since there's no fixed route and the sea bottom can sometimes take you waist-deep or even breast-deep. In midsummer you can often see people (friends and families) wading.