Late last night I went for a stroll along Ohama beach and with every wave that crashed on the beach, glowing lights shimmered at my feet. I have never seen so many yakochu (bioluminescent plankton)!
If you are quick, you can catch these mysterious glowing lights. When one lights up, scoop it up along with a bit of sand, keep shaking your hands slightly or the light will go out. The plankton only lights up when disturbed.