Aliases
Mottainai Grandma, Mottainai Baasan, もったいないばあさん, Default, Japanese, English
S202SPRING 2020ONA
Part of this franchise
concluded
Announced
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Completed
Mottainai Baasan
もったいないばあさん
In the books, the titular Grandma seeks to explore the true meaning of the Japanese phrase "mottainai" after her son asked her what it meant and she couldn't answer. "Mottainai" is a commonly used exclamation that roughly translates to "what a waste!", expressing regret over wastefulness. The Grandma seeks to explore the meaning and importance of "mottainai" in the story.
(Source: Anime News Network)
(Source: Anime News Network)
Last updated
Jun 3, 2026, 11:05 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
13.3
CourScore is the probability of an official sequel announcement within 18 months.
Signal coverage: 72% • Signal freshness: High • Updated 29 minutes ago
Top reasons
- Cross-platform audience rating - Weighted audience rating 0.0
- Committee renewal track record - Lead committee members (LIDENFILMS) historically renew 2% of productions
- Favourite base strength - 0 cross-platform favourites
Runway
Unknown
Source runway is unclear, so feasibility is treated as unknown.
Financial & Commercial17
Production Feasibility25
Audience Reception0
Strategic Priors8
Fandom Engagement0
CourScore history
CourScore over time
Last analysedJun 3, 2026, 11:05 PM
Next scheduledtomorrow
Latest signals
Fresh telemetry
Courcast watches every connected signal to surface the freshest indicators of momentum.
| Source | Metric | Geo | Value | Collected |
|---|---|---|---|---|
| youtube | views 30d | GLOBAL | 14,329 | May 12, 2026, 12:00 AM |
| youtube | channel views total | GLOBAL | 542 | May 12, 2026, 12:00 AM |
| youtube | subscribers total | GLOBAL | 0 | May 12, 2026, 12:00 AM |
| youtube | uploads 30d | GLOBAL | 25 | May 12, 2026, 12:00 AM |
| youtube | uploads 7d | GLOBAL | 25 | May 12, 2026, 12:00 AM |
| youtube | views 7d | GLOBAL | 14,329 | May 12, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 33 | Jan 1, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 0 | May 8, 2026, 12:00 AM |
| wikipedia | pageviews daily | EN.WIKIPEDIA | 1 | Apr 30, 2026, 12:00 AM |
| anilist | favorites | GLOBAL | 0 | May 31, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 113 | May 31, 2026, 12:00 AM |
| mal | watching | GLOBAL | 35 | May 25, 2026, 12:00 AM |
| mal | completed | GLOBAL | 135 | May 25, 2026, 12:00 AM |
| anilist | trending | GLOBAL | 0 | May 31, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 100 | May 25, 2026, 12:00 AM |
| mangaupdates | bayesian rating | GLOBAL | 6.22 | May 23, 2026, 12:00 AM |
| tmdb | popularity | GLOBAL | 1.03 | Jun 1, 2026, 12:00 AM |
| tmdb | vote count | GLOBAL | 1 | Jun 1, 2026, 12:00 AM |