Is Oshiri Tantei 4 getting a new season?

According to Courcast's latest analysis, Oshiri Tantei 4 has a 29% renewal probability. 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% renewal probability 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% 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

S21SPRING 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

Jul 25, 2026, 03:31 PM

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 is the probability of an official sequel announcement within 18 months, blending attention velocity, completion strength, and catalogue health.

Confirmed

Announced Jan 1, 2021, 12:00 AM

CourScore is the probability of an official sequel announcement within 18 months.

Signal coverage: 92% • Signal freshness: High • Frozen 3 days 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 analysedJul 25, 2026, 03:31 PM

Next scheduled2 days ago

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-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
kitsu	favorites	GLOBAL	38	Jul 22, 2026, 12:00 AM
tmdb	vote count	GLOBAL	3	Jul 16, 2026, 12:00 AM
tmdb	popularity	GLOBAL	10.13	Jul 16, 2026, 12:00 AM
mal	members	GLOBAL	401	Jul 22, 2026, 12:00 AM
mal	watching	GLOBAL	35	Jul 22, 2026, 12:00 AM
reddit	mentions 7d	GLOBAL	1	Jul 22, 2026, 12:00 AM
simkl	score mean	GLOBAL	15	Jul 22, 2026, 12:00 AM
filmarks	score mean	JP	68	Jul 22, 2026, 12:00 AM
anilist	favorites	GLOBAL	0	Jul 22, 2026, 12:00 AM
crunchyroll	episode count	GLOBAL	10	Jul 22, 2026, 12:00 AM
crunchyroll	episode likes	GLOBAL	168	Jul 22, 2026, 12:00 AM
crunchyroll	episode dislikes	GLOBAL	12	Jul 22, 2026, 12:00 AM
justwatch	jp platform count	JP	2	Jul 22, 2026, 12:00 AM
filmarks	mark count	JP	41	Jul 22, 2026, 12:00 AM
reddit	mentions 1d	GLOBAL	1	Jul 19, 2026, 12:00 AM
niconico	episode mylists	JP	11	Jul 22, 2026, 12:00 AM
crunchyroll	series available	GLOBAL	1	Jul 22, 2026, 12:00 AM
kitsu	rating rank	GLOBAL	137	Jul 22, 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 7d	GLOBAL	13,579	Jun 17, 2026, 12:00 AM
wikipedia	pageviews daily	EN.WIKIPEDIA	9	Jun 8, 2026, 12:00 AM
anilist	popularity	GLOBAL	146	Jul 22, 2026, 12:00 AM
reddit	threads 7d	GLOBAL	1	Jul 22, 2026, 12:00 AM
shikimori	completion ratio	GLOBAL	0.04	Jul 22, 2026, 12:00 AM
youtube	subscribers total	GLOBAL	1,290	Jun 17, 2026, 12:00 AM
five ch	thread posts	JP	119	Jul 22, 2026, 12:00 AM
kitsu	member count	GLOBAL	6,886	Jul 22, 2026, 12:00 AM
mal	plan to watch	GLOBAL	136	Jul 22, 2026, 12:00 AM
shikimori	score mean	GLOBAL	0	Jul 22, 2026, 12:00 AM
youtube	channel views total	GLOBAL	260,870	Jun 17, 2026, 12:00 AM
youtube	views 30d	GLOBAL	13,579	Jun 17, 2026, 12:00 AM
niconico	episode comments	JP	200	Jul 22, 2026, 12:00 AM
anilist	trending	GLOBAL	0	Jul 22, 2026, 12:00 AM
reddit	score 7d	GLOBAL	62	Jul 22, 2026, 12:00 AM
reddit	thread count	GLOBAL	1	Jul 22, 2026, 12:00 AM
niconico	episode views	JP	5,343	Jul 22, 2026, 12:00 AM
google trends	interest daily	GLOBAL	0	Jul 19, 2026, 12:00 AM
google trends	interest weekly	GLOBAL	0	Jul 12, 2026, 12:00 AM
kitsu	score mean	GLOBAL	82.63	Jul 22, 2026, 12:00 AM
shikimori	member count	GLOBAL	257	Jul 22, 2026, 12:00 AM
mal	completed	GLOBAL	97	Jul 22, 2026, 12:00 AM
reddit	comments 7d	GLOBAL	52	Jul 22, 2026, 12:00 AM

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