Aliases
Rupan Sansei, Lupin III: Blood Seal - Eternal Mermaid, Lupin III: Blood Seal of the Eternal Mermaid, Lupin III - Il sigillo di sangue, la sirena dell'eternità, Lupin III: Chi no Kokuin - Eien no Mermaid, Lupin the 3rd: Blood Seal of the Eternal Mermaid, ルパン三世 血の刻印 - 永遠のMermaid
WINTER 2011SPECIAL
Branch
Part of this franchise
concluded
Announced
In production
Releasing
Completed
An Aquamarine gemstone, the Mermaid's Scale, appears in a secret, underground auction. The queen of the underworld (nicknamed the "Bearslayer") coerces the professional jewel-lifter Lupin into stealing the rock for her. Lupin swipes the stone, and quickly discovers not only that it's a forgery, but that the real Mermaid's Scale is part of an unsolved riddle that leads to transcending mortality! Soon, the "Bearslayer" is found murdered in cold blood! Her seemingly immortal young aide, Misa, is kidnapped by the arms dealer Himuro. The race is on for Lupin and his gang to locate the secret to eternal life... before it's used to send the Earth into a state of endless war!
(Source: Discotek Media)
(Source: Discotek Media)
Last updated
Oct 28, 2026, 06:15 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
18.7
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 10 hours ago
Top reasons
- Cross-platform audience rating - Weighted audience rating 72.7
- Committee renewal track record - Lead committee members (Telecom Animation Film) have a smoothed catalogue continuation rate of 33%, above the catalogue average of 14%
- Cohort rating percentile - 78th percentile within season cohort
Runway
Unknown
Source runway is unclear, so feasibility is treated as unknown.
Financial & Commercial48
Production Feasibility27
Audience Reception60
Strategic Priors48
Fandom Engagement40
CourScore history
CourScore over time
Last analysedOct 28, 2026, 06:15 AM
Next scheduledin 14 hours
Renewal FAQ
Lupin the 3rd: Blood Seal of the Eternal Mermaid renewal questions
Common questions about this title's renewal prospects, answered by Courcast's daily analysis.
- Is Lupin the 3rd: Blood Seal of the Eternal Mermaid getting a new season?
- According to Courcast's latest analysis, Lupin the 3rd: Blood Seal of the Eternal Mermaid has a 19/100 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 Lupin the 3rd: Blood Seal of the Eternal Mermaid be renewed?
- Lupin the 3rd: Blood Seal of the Eternal Mermaid currently scores 19 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 Lupin the 3rd: Blood Seal of the Eternal Mermaid's renewal probability?
- Lupin the 3rd: Blood Seal of the Eternal Mermaid's CourScore is 19 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 | 70 | Oct 7, 2026, 12:00 AM |
| anilist | favorites | GLOBAL | 15 | Oct 7, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 2,794 | Oct 7, 2026, 12:00 AM |
| anilist | trending | GLOBAL | 0 | Oct 7, 2026, 12:00 AM |
| ann | rating | GLOBAL | 7.44 | Oct 25, 2026, 12:00 AM |
| crunchyroll | episode count | GLOBAL | 12 | Sep 23, 2026, 12:00 AM |
| crunchyroll | episode dislikes | GLOBAL | 129 | Sep 23, 2026, 12:00 AM |
| crunchyroll | episode likes | GLOBAL | 2,234 | Sep 23, 2026, 12:00 AM |
| crunchyroll | series available | GLOBAL | 1 | Sep 23, 2026, 12:00 AM |
| google trends | interest daily | GLOBAL | 0 | Sep 22, 2026, 12:00 AM |
| google trends | interest weekly | GLOBAL | 100 | Sep 13, 2026, 12:00 AM |
| kitsu | favorites | GLOBAL | 151 | Oct 21, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 11,168 | Oct 21, 2026, 12:00 AM |
| kitsu | rating rank | GLOBAL | 729 | Oct 21, 2026, 12:00 AM |
| kitsu | score mean | GLOBAL | 80.5 | Oct 21, 2026, 12:00 AM |
| mal | chapters total | GLOBAL | 12 | Aug 19, 2026, 12:00 AM |
| mal | completed | GLOBAL | 5,429 | Oct 21, 2026, 12:00 AM |
| mal | members | GLOBAL | 8,707 | Oct 21, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 2,788 | Oct 21, 2026, 12:00 AM |
| mal | rating | GLOBAL | 7.2 | Aug 19, 2026, 12:00 AM |
| mal | source members | GLOBAL | 4,308 | Aug 19, 2026, 12:00 AM |
| mal | source status code | GLOBAL | 3 | Aug 19, 2026, 12:00 AM |
| mal | volumes total | GLOBAL | 2 | Aug 19, 2026, 12:00 AM |
| mal | watching | GLOBAL | 215 | Oct 21, 2026, 12:00 AM |
| mfc | figures total | GLOBAL | 0 | Oct 23, 2026, 12:00 AM |
| mfc | goods total | GLOBAL | 0 | Oct 23, 2026, 12:00 AM |
| mfc | media total | GLOBAL | 3 | Oct 23, 2026, 12:00 AM |
| mfc | merch added 30d | GLOBAL | 0 | Oct 23, 2026, 12:00 AM |
| mfc | merch total | GLOBAL | 3 | Oct 23, 2026, 12:00 AM |
| niconico | episode comments | JP | 43 | Oct 7, 2026, 12:00 AM |
| niconico | episode mylists | JP | 57 | Oct 7, 2026, 12:00 AM |
| niconico | episode views | JP | 4,986 | Oct 7, 2026, 12:00 AM |
| comments 7d | GLOBAL | 72 | Oct 7, 2026, 12:00 AM | |
| mentions 7d | GLOBAL | 1 | Oct 7, 2026, 12:00 AM | |
| score 7d | GLOBAL | 137 | Oct 7, 2026, 12:00 AM | |
| thread count | GLOBAL | 1 | Oct 7, 2026, 12:00 AM | |
| threads 7d | GLOBAL | 1 | Oct 7, 2026, 12:00 AM | |
| shikimori | completion ratio | GLOBAL | 0.47 | Oct 21, 2026, 12:00 AM |
| shikimori | member count | GLOBAL | 1,391 | Oct 21, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 72.7 | Oct 21, 2026, 12:00 AM |
| simkl | score mean | GLOBAL | 68 | Sep 2, 2026, 12:00 AM |
| wikipedia | pageviews daily | EN.WIKIPEDIA | 7 | Oct 26, 2026, 12:00 AM |
| youtube | channel views total | GLOBAL | 0 | Jun 29, 2026, 12:00 AM |
| youtube | subscribers total | GLOBAL | 0 | Jun 29, 2026, 12:00 AM |
| youtube | uploads 30d | GLOBAL | 25 | Jun 29, 2026, 12:00 AM |
| youtube | uploads 7d | GLOBAL | 25 | Jun 29, 2026, 12:00 AM |
| youtube | views 30d | GLOBAL | 20,721 | Jun 29, 2026, 12:00 AM |
| youtube | views 7d | GLOBAL | 20,721 | Jun 29, 2026, 12:00 AM |