Aliases
Shirotan: Shirotan ga Ippai!, しろたん しろたんがいっぱい!, Sirotan, Sirotan: Sirotan ga Ippai!, Sirotan: Shirotan ga Ippai!
S1SUMMER 2017ONA
Part of this franchise
concluded
Announced
In production
Releasing
Completed
Described as a "soft and fluffy" story, the anime features the adventures of Sirotan, a baby seal who likes to nap and dream about many different relaxing activities.
(Source: Crunchyroll)
(Source: Crunchyroll)
Last updated
Aug 30, 2026, 01:41 PM
Franchise overview
Franchise timeline
Review every Courcast-tracked season for this series and jump between entries.
Renewal pulse
Courcast score breakdown
CourScore is the probability of an official sequel announcement within 18 months, blending attention velocity, completion strength, and catalogue health.
CourScore
39.2
CourScore is the probability of an official sequel announcement within 18 months.
Signal coverage: 100% • Signal freshness: High • Updated 13 days ago
Top reasons
- Cross-platform audience rating - Weighted audience rating 63.6
- Key staff availability - Director Mariko Tokunaga has no other concurrent active productions
- Official social silence (negative signal) - Official JP account active (last post 10d ago)
Runway
Unknown
Source runway is unclear, so feasibility is treated as unknown.
Financial & Commercial27
Production Feasibility39
Audience Reception63
Strategic Priors31
Fandom Engagement43
CourScore history
CourScore over time
Last analysedAug 30, 2026, 01:41 PM
Next scheduled12 days ago
Renewal FAQ
Sirotan: Sirotan ga Ippai! renewal questions
Common questions about this title's renewal prospects, answered by Courcast's daily analysis.
- Is Sirotan: Sirotan ga Ippai! getting a new season?
- According to Courcast's latest analysis, Sirotan: Sirotan ga Ippai! has a 39% renewal probability. 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 Sirotan: Sirotan ga Ippai! be renewed?
- Sirotan: Sirotan ga Ippai! currently scores 39 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. Titles scoring above 70 are considered Very Likely to receive a continuation.
- What is Sirotan: Sirotan ga Ippai!'s renewal probability?
- Sirotan: Sirotan ga Ippai!'s CourScore is 39 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-updated probability 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 | 46 | Sep 4, 2026, 12:00 AM |
| anilist | favorites | GLOBAL | 1 | Sep 4, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 254 | Sep 4, 2026, 12:00 AM |
| anilist | trending | GLOBAL | 0 | Sep 4, 2026, 12:00 AM |
| crunchyroll | series available | GLOBAL | 1 | Sep 11, 2026, 12:00 AM |
| filmarks | mark count | JP | 2 | Sep 11, 2026, 12:00 AM |
| filmarks | score mean | JP | 80 | Sep 11, 2026, 12:00 AM |
| google trends | interest daily | GLOBAL | 9 | Sep 10, 2026, 12:00 AM |
| google trends | interest weekly | GLOBAL | 52 | Aug 30, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 103 | Sep 11, 2026, 12:00 AM |
| mal | completed | GLOBAL | 191 | Sep 11, 2026, 12:00 AM |
| mal | members | GLOBAL | 558 | Sep 11, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 193 | Sep 11, 2026, 12:00 AM |
| mal | watching | GLOBAL | 50 | Sep 11, 2026, 12:00 AM |
| niconico | episode comments | JP | 1,258 | Sep 11, 2026, 12:00 AM |
| niconico | episode mylists | JP | 1,206 | Sep 11, 2026, 12:00 AM |
| niconico | episode views | JP | 131,691 | Sep 11, 2026, 12:00 AM |
| comments 7d | GLOBAL | 10 | Sep 4, 2026, 12:00 AM | |
| mentions 7d | GLOBAL | 1 | Sep 4, 2026, 12:00 AM | |
| score 7d | GLOBAL | 53 | Sep 4, 2026, 12:00 AM | |
| thread count | GLOBAL | 1 | Sep 4, 2026, 12:00 AM | |
| threads 7d | GLOBAL | 1 | Sep 4, 2026, 12:00 AM | |
| shikimori | completion ratio | GLOBAL | 0.06 | Sep 11, 2026, 12:00 AM |
| shikimori | member count | GLOBAL | 211 | Sep 11, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 62 | Sep 11, 2026, 12:00 AM |
| simkl | score mean | GLOBAL | 55 | Aug 7, 2026, 12:00 AM |
| tmdb | popularity | GLOBAL | 0.35 | Sep 11, 2026, 12:00 AM |
| tmdb | vote count | GLOBAL | 0 | Sep 11, 2026, 12:00 AM |
| wikipedia | pageviews daily | EN.WIKIPEDIA | 45 | Sep 10, 2026, 12:00 AM |
| x | followers count | GLOBAL | 108,203 | Jul 20, 2026, 12:00 AM |
| x official jp | posts 7d | JP | 11 | Jul 31, 2026, 12:00 AM |
| x official jp | silent days | JP | 10 | Aug 7, 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 | 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 |