As of Jun 19, 2026, 8:54 PM, past peak, season runs to ~July 15. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Seasonal blooms of bioluminescent plankton regularly produce a blue glow along Takeno Beach in Toyooka, Hyogo Prefecture.
The phenomenon is most visible on calm, warm nights when microscopic dinoflagellates or related plankton are concentrated near shore, causing waves and splashes to flash bright blue.
Where to see it
A taste of where to see it. The full map, exact coordinates and the best timing for each spot live in the app.
| Viewing spots |
|---|
| Takeno Beach Main Shoreline |
| Takeno Fishing Port East Pier |
| + 1 more spot, with exact coordinates and timing, in the app → |
This is the short version
This page shows a taste. The app has the full list of where to see this, the exact timing, and live conditions for 1,000+ natural phenomena worldwide, so you know the moment one is genuinely worth the trip.