Is Oshiri Tantei 4 getting a new season?

According to Courcast's latest analysis, Oshiri Tantei 4 has a 29/100 renewal signal score. This score is updated daily and reflects fandom momentum, streaming signals, and franchise history. Visit https://courcast.com/title/oshiri-tantei-4-spring-2020 for the full breakdown.

Will Oshiri Tantei 4 be renewed?

Oshiri Tantei 4 currently has a 29/100 renewal signal score on Courcast. Signals driving this score include online discussion volume, sequel history in the franchise, and platform engagement data - all updated daily.

What is Oshiri Tantei 4's renewal probability?

Oshiri Tantei 4's CourScore is 29/100 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 probability estimate. See the full score breakdown at https://courcast.com/title/oshiri-tantei-4-spring-2020.

Aliases

Butt Detective 4, Oshiri Tantei 4, おしりたんてい (第4シリーズ), Oshiri Tantei 4th Season, Butt Detective, おしりたんてい

SPRING 2020TV

Part of this franchise

concluded

Announced

In production

Releasing

Completed

Oshiri Tantei 4

おしりたんてい (第4シリーズ)

X Reddit

Fourth season of Oshiri Tantei.

Last updated

Oct 28, 2026, 06:20 AM

Evidence

Announcement status

Official announcement records with supporting citations.

Confirmed

TV season

Official announcement logged Jan 1, 2021, 12:00 AM.

Franchise overview

Franchise timeline

Review every Courcast-tracked season for this series and jump between entries.

View franchise tree

Renewal pulse

Courcast score breakdown

CourScore weighs signals for an official sequel announcement within 18 months, blending attention velocity, completion strength, and catalogue health.

Confirmed

Announced Jan 1, 2021, 12:00 AM

CourScore measures renewal signals out of 100. It is not a calibrated probability of an official sequel announcement within 18 months.

Signal coverage: 92% • Signal freshness: High • Frozen 5 hours ago

Top reasons

Cross-platform audience rating - Weighted audience rating 78.7
Committee renewal track record - Lead committee members (Toei Animation, NHK) 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 & Commercial18

Production Feasibility25

Audience Reception79

Strategic Priors9

Fandom Engagement0

CourScore history

CourScore over time

Last analysedOct 28, 2026, 06:20 AM

Next scheduledin 19 hours

Renewal FAQ

Oshiri Tantei 4 renewal questions

Common questions about this title's renewal prospects, answered by Courcast's daily analysis.

Is Oshiri Tantei 4 getting a new season?: Yes - Oshiri Tantei 4 has an officially confirmed continuation. See the Announcement Status section above for the full details and citations.
Will Oshiri Tantei 4 be renewed?: Oshiri Tantei 4 has already been confirmed for a new entry - it has cleared the renewal hurdle. See the Announcement Status section for the source citation.
What is Oshiri Tantei 4's renewal probability?: Oshiri Tantei 4's CourScore is 29 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	favorites	GLOBAL	0	Oct 23, 2026, 12:00 AM
anilist	popularity	GLOBAL	155	Oct 23, 2026, 12:00 AM
anilist	trending	GLOBAL	0	Oct 23, 2026, 12:00 AM
crunchyroll	episode count	GLOBAL	16	Sep 25, 2026, 12:00 AM
crunchyroll	episode dislikes	GLOBAL	11	Sep 25, 2026, 12:00 AM
crunchyroll	episode likes	GLOBAL	742	Sep 25, 2026, 12:00 AM
crunchyroll	series available	GLOBAL	1	Sep 25, 2026, 12:00 AM
filmarks	mark count	JP	45	Oct 23, 2026, 12:00 AM
filmarks	score mean	JP	68	Oct 23, 2026, 12:00 AM
five ch	thread posts	JP	218	Oct 23, 2026, 12:00 AM
google trends	interest daily	GLOBAL	0	Sep 10, 2026, 12:00 AM
google trends	interest weekly	GLOBAL	6	Jul 19, 2026, 12:00 AM
justwatch	jp platform count	JP	2	Oct 23, 2026, 12:00 AM
kitsu	favorites	GLOBAL	38	Oct 23, 2026, 12:00 AM
kitsu	member count	GLOBAL	6,985	Oct 23, 2026, 12:00 AM
kitsu	rating rank	GLOBAL	142	Oct 23, 2026, 12:00 AM
kitsu	score mean	GLOBAL	82.65	Oct 23, 2026, 12:00 AM
mal	completed	GLOBAL	101	Oct 9, 2026, 12:00 AM
mal	members	GLOBAL	412	Oct 9, 2026, 12:00 AM
mal	plan to watch	GLOBAL	137	Oct 9, 2026, 12:00 AM
mal	watching	GLOBAL	36	Oct 9, 2026, 12:00 AM
niconico	episode comments	JP	200	Oct 23, 2026, 12:00 AM
niconico	episode mylists	JP	11	Oct 23, 2026, 12:00 AM
niconico	episode views	JP	5,369	Oct 23, 2026, 12:00 AM
reddit	comments 7d	GLOBAL	37	Oct 23, 2026, 12:00 AM
reddit	mentions 1d	GLOBAL	1	Jul 19, 2026, 12:00 AM
reddit	mentions 7d	GLOBAL	2	Oct 23, 2026, 12:00 AM
reddit	score 7d	GLOBAL	39	Oct 23, 2026, 12:00 AM
reddit	thread count	GLOBAL	2	Oct 23, 2026, 12:00 AM
reddit	threads 7d	GLOBAL	2	Oct 23, 2026, 12:00 AM
shikimori	completion ratio	GLOBAL	0.04	Oct 23, 2026, 12:00 AM
shikimori	member count	GLOBAL	257	Oct 23, 2026, 12:00 AM
shikimori	score mean	GLOBAL	0	Oct 23, 2026, 12:00 AM
simkl	score mean	GLOBAL	15	Oct 9, 2026, 12:00 AM
tmdb	popularity	GLOBAL	10.13	Jul 16, 2026, 12:00 AM
tmdb	vote count	GLOBAL	3	Jul 16, 2026, 12:00 AM
wikipedia	pageviews daily	EN.WIKIPEDIA	1	Jul 25, 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

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