Aliases
Niji-iro Hotaru: Eien no Natsuyasumi, Rainbow-colored Firefly: Never Ending Summer Vacation, Niji-Iro Hotaru ~Eien no Natsu Yasumi~, Rainbow-Colored Fireflies: The Eternal Summer Vacation, Nijiiro Hotaru: Eien no Natsuyasumi, 虹色ほたる~永遠の夏休み~, Rainbow Fireflies
SPRING 2012MOVIE
Part of this franchise
concluded
Announced
In production
Releasing
Completed
Yuuta was 12-year-old boy, who had lost his father in the traffic accident one year ago. In the summer vacation, he visited a deserted dam deep in the mountains, where he had a good time with his father before.
Suddenly a thunder storm occurred and he slipped on the ground. He lost consciousness and woke up to find a girl and an unfamiliar village. He time-traveled 30 years and reached a village, which sank at the bottom of the dam.
This is Yuuta's precious memory of "another" summer vacation.
Suddenly a thunder storm occurred and he slipped on the ground. He lost consciousness and woke up to find a girl and an unfamiliar village. He time-traveled 30 years and reached a village, which sank at the bottom of the dam.
This is Yuuta's precious memory of "another" summer vacation.
Last updated
Oct 28, 2026, 06:21 AM
Franchise overview
Franchise timeline
Review every Courcast-tracked season for this series and jump between entries.
Renewal pulse
Courcast score breakdown
CourScore weighs signals for an official sequel announcement within 18 months, blending attention velocity, completion strength, and catalogue health.
CourScore
16.6
CourScore measures renewal signals out of 100. It is not a calibrated probability of an official sequel announcement within 18 months.
Signal coverage: 100% • Signal freshness: High • Updated 11 hours ago
Top reasons
- Cohort rating percentile - 65th percentile within season cohort
- Titles like this rarely return - 14 years with no new entry: of films (first entries) in that position, under 1% got a new season or film within 10 years
- Time since finale - ~175 months since estimated air window ended
Runway
Unknown
Source runway is unclear, so feasibility is treated as unknown.
Financial & Commercial50
Production Feasibility24
Audience Reception46
Strategic Priors40
Fandom Engagement50
CourScore history
CourScore over time
Last analysedOct 28, 2026, 06:21 AM
Next scheduledin 13 hours
Renewal FAQ
Nijiiro Hotaru: Eien no Natsuyasumi renewal questions
Common questions about this title's renewal prospects, answered by Courcast's daily analysis.
- Is Nijiiro Hotaru: Eien no Natsuyasumi getting a new season?
- According to Courcast's latest analysis, Nijiiro Hotaru: Eien no Natsuyasumi has a 17/100 renewal signal score. This score is updated daily and blends fandom momentum, streaming signals, source-material runway, and franchise history. Check back regularly for the latest forecast.
- Will Nijiiro Hotaru: Eien no Natsuyasumi be renewed?
- Nijiiro Hotaru: Eien no Natsuyasumi currently scores 17 out of 100 on Courcast. Signals driving this estimate include online discussion volume, sequel history within the franchise, and platform engagement data - all recalculated daily. Scores from 70 indicate strong renewal signals; scores from 85 are labelled very likely.
- What is Nijiiro Hotaru: Eien no Natsuyasumi's renewal probability?
- Nijiiro Hotaru: Eien no Natsuyasumi's CourScore is 17 as of the latest update. CourScore is Courcast's proprietary metric that aggregates over a dozen renewal signals - from source-material runway to social buzz - into a single daily signal score out of 100.
Latest signals
Fresh telemetry
Courcast watches every connected signal to surface the freshest indicators of momentum.
| Source | Metric | Geo | Value | Collected |
|---|---|---|---|---|
| anilist | average score | GLOBAL | 67 | Oct 20, 2026, 12:00 AM |
| anilist | favorites | GLOBAL | 34 | Oct 20, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 3,497 | Oct 20, 2026, 12:00 AM |
| anilist | trending | GLOBAL | 0 | Oct 20, 2026, 12:00 AM |
| crunchyroll | episode count | GLOBAL | 12 | Sep 8, 2026, 12:00 AM |
| crunchyroll | episode dislikes | GLOBAL | 63 | Sep 8, 2026, 12:00 AM |
| crunchyroll | episode likes | GLOBAL | 1,422 | Sep 8, 2026, 12:00 AM |
| crunchyroll | series available | GLOBAL | 1 | Sep 15, 2026, 12:00 AM |
| google trends | interest daily | GLOBAL | 0 | Oct 19, 2026, 12:00 AM |
| google trends | interest weekly | GLOBAL | 0 | Sep 6, 2026, 12:00 AM |
| kitsu | favorites | GLOBAL | 1 | Oct 20, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 945 | Oct 20, 2026, 12:00 AM |
| kitsu | rating rank | GLOBAL | 5,123 | Oct 20, 2026, 12:00 AM |
| kitsu | score mean | GLOBAL | 70.68 | Oct 20, 2026, 12:00 AM |
| mal | chapters total | GLOBAL | 11 | Oct 26, 2026, 12:00 AM |
| mal | completed | GLOBAL | 3,035 | Oct 20, 2026, 12:00 AM |
| mal | members | GLOBAL | 9,062 | Oct 20, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 5,363 | Oct 20, 2026, 12:00 AM |
| mal | source members | GLOBAL | 91 | Oct 26, 2026, 12:00 AM |
| mal | source status code | GLOBAL | 3 | Oct 26, 2026, 12:00 AM |
| mal | volumes total | GLOBAL | 1 | Oct 26, 2026, 12:00 AM |
| mal | watching | GLOBAL | 353 | Oct 20, 2026, 12:00 AM |
| mangaupdates | bayesian rating | GLOBAL | 6.31 | Oct 26, 2026, 12:00 AM |
| niconico | episode comments | JP | 103 | Oct 20, 2026, 12:00 AM |
| niconico | episode mylists | JP | 45 | Oct 20, 2026, 12:00 AM |
| niconico | episode views | JP | 7,359 | Oct 20, 2026, 12:00 AM |
| shikimori | completion ratio | GLOBAL | 0.33 | Oct 20, 2026, 12:00 AM |
| shikimori | member count | GLOBAL | 1,790 | Oct 20, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 69.8 | Oct 20, 2026, 12:00 AM |
| simkl | score mean | GLOBAL | 67 | Oct 20, 2026, 12:00 AM |
| wikipedia | pageviews daily | EN.WIKIPEDIA | 8 | Oct 27, 2026, 12:00 AM |
| youtube | channel views total | GLOBAL | 260,870 | Jun 17, 2026, 12:00 AM |
| youtube | subscribers total | GLOBAL | 1,290 | Jun 17, 2026, 12:00 AM |
| youtube | trailer likes | GLOBAL | 1,703 | Oct 20, 2026, 12:00 AM |
| youtube | trailer views | GLOBAL | 318,382 | Oct 20, 2026, 12:00 AM |
| youtube | uploads 30d | GLOBAL | 25 | Jun 17, 2026, 12:00 AM |
| youtube | uploads 7d | GLOBAL | 25 | Jun 17, 2026, 12:00 AM |
| youtube | views 30d | GLOBAL | 13,579 | Jun 17, 2026, 12:00 AM |
| youtube | views 7d | GLOBAL | 13,579 | Jun 17, 2026, 12:00 AM |