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

Sep 11, 2026, 06:30 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 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 15 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 analysedSep 11, 2026, 06:30 AM

Next scheduledin 9 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-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	favorites	GLOBAL	0	Aug 28, 2026, 12:00 AM
anilist	popularity	GLOBAL	148	Aug 28, 2026, 12:00 AM
anilist	trending	GLOBAL	0	Aug 28, 2026, 12:00 AM
crunchyroll	episode count	GLOBAL	16	Sep 11, 2026, 12:00 AM
crunchyroll	episode dislikes	GLOBAL	11	Sep 11, 2026, 12:00 AM
crunchyroll	episode likes	GLOBAL	742	Sep 11, 2026, 12:00 AM
crunchyroll	series available	GLOBAL	1	Sep 11, 2026, 12:00 AM
filmarks	mark count	JP	44	Sep 11, 2026, 12:00 AM
filmarks	score mean	JP	68	Sep 11, 2026, 12:00 AM
five ch	thread posts	JP	214	Sep 11, 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	Sep 11, 2026, 12:00 AM
kitsu	favorites	GLOBAL	38	Sep 11, 2026, 12:00 AM
kitsu	member count	GLOBAL	6,932	Sep 11, 2026, 12:00 AM
kitsu	rating rank	GLOBAL	139	Sep 11, 2026, 12:00 AM
kitsu	score mean	GLOBAL	82.66	Sep 11, 2026, 12:00 AM
mal	completed	GLOBAL	98	Sep 11, 2026, 12:00 AM
mal	members	GLOBAL	404	Sep 11, 2026, 12:00 AM
mal	plan to watch	GLOBAL	137	Sep 11, 2026, 12:00 AM
mal	watching	GLOBAL	35	Sep 11, 2026, 12:00 AM
niconico	episode comments	JP	200	Sep 11, 2026, 12:00 AM
niconico	episode mylists	JP	11	Sep 11, 2026, 12:00 AM
niconico	episode views	JP	5,357	Sep 11, 2026, 12:00 AM
reddit	comments 7d	GLOBAL	70	Sep 11, 2026, 12:00 AM
reddit	mentions 1d	GLOBAL	1	Jul 19, 2026, 12:00 AM
reddit	mentions 7d	GLOBAL	3	Sep 11, 2026, 12:00 AM
reddit	score 7d	GLOBAL	55	Sep 11, 2026, 12:00 AM
reddit	thread count	GLOBAL	3	Sep 11, 2026, 12:00 AM
reddit	threads 7d	GLOBAL	3	Sep 11, 2026, 12:00 AM
shikimori	completion ratio	GLOBAL	0.04	Sep 11, 2026, 12:00 AM
shikimori	member count	GLOBAL	255	Sep 11, 2026, 12:00 AM
shikimori	score mean	GLOBAL	0	Sep 11, 2026, 12:00 AM
simkl	score mean	GLOBAL	15	Aug 7, 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	9	Jun 8, 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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