Toyama Bay firefly squid in May 2027: darkest nights
Firefly squid (hotaru-ika) glow as fishermen haul nets before dawn. Sightseeing boats leave around 3 am. March to May only.
0 pitch-dark nights, 0 dark nights
New moon Thu 6 May · Full moon Thu 20 May
Night by night, May 2027
| Night | Moon | 03:00 | Best |
|---|---|---|---|
| Sat 1 May | 24% | ●●●●● | 03:00 |
| Sun 2 May | 16% | ●●●●● | 03:00 |
| Mon 3 May | 9% | ●●●●● | 03:00 |
| Tue 4 May | 4% | ●●●●● | 03:00 |
| Wed 5 May | 1% | ●●●●● | 03:00 |
| Thu 6 May | 0% | ●●●●● | 03:00 |
| Fri 7 May | 2% | ●●●●● | 03:00 |
| Sat 8 May | 6% | ●●●●● | 03:00 |
| Sun 9 May | 13% | ●●●●● | 03:00 |
| Mon 10 May | 21% | ●●●●● | 03:00 |
| Tue 11 May | 32% | ●●●●● | 03:00 |
| Wed 12 May | 43% | ●●●●● | 03:00 |
| Thu 13 May | 55% | ●●●●● | 03:00 |
| Fri 14 May | 66% | ●●●●● | 03:00 |
| Sat 15 May | 77% | ●●●●● | 03:00 |
| Sun 16 May | 85% | ●●●●● | 03:00 |
| Mon 17 May | 92% | ●●●●● | 03:00 |
| Tue 18 May | 97% | ●●●●● | 03:00 |
| Wed 19 May | 99% | ●●●●● | 03:00 |
| Thu 20 May | 100% | ●●●●● | 03:00 |
| Fri 21 May | 98% | ●●●●● | 03:00 |
| Sat 22 May | 95% | ●●●●● | 03:00 |
| Sun 23 May | 90% | ●●●●● | 03:00 |
| Mon 24 May | 84% | ●●●●● | 03:00 |
| Tue 25 May | 76% | ●●●●● | 03:00 |
| Wed 26 May | 68% | ●●●●● | 03:00 |
| Thu 27 May | 58% | ●●●●● | 03:00 |
| Fri 28 May | 49% | ●●●●● | 03:00 |
| Sat 29 May | 39% | ●●●●● | 03:00 |
| Sun 30 May | 29% | ●●●●● | 03:00 |
| Mon 31 May | 21% | ●●●●● | 03:00 |
Check one night in detail Toyama Bay firefly squid tours
Questions
What are the best nights to see the bioluminescence at Toyama Bay firefly squid in May 2027?
0 of 31 nights score at least 4 out of 5 for darkness.
Which nights should I avoid in May 2027?
Avoid the nights around the full moon on Thu 20 May, when moonlight washes out the glow.
Toyama Bay firefly squid darkness by month
Darkness score 1-5 per tour slot from twilight and moonlight. Weather and plankton health are not included. Times are local (Asia/Tokyo).