THEビッグオー (2003)

The Big O II

🕯️ Cult favourite

Continuation of The Big O. Notes: - Originally planned as a 26-episode series, low viewership in Japan reduced production to the first 13. - Positive international reception resulted in a second season consisting of the remaining 13 episodes; co-produced by Cartoon Network, Sunrise, and Bandai Visual.

Names

Original	THEビッグオー (2003) (japanese)
Romaji	THE Big O (2003)
English	The Big O II
Also known as	THE Big O Season 2

Facts

Format	TV series · 13 ep · 24 min · 5h total
Aired	2003-01-02 → 2003-03-27 (Winter 2003)
Status	FINISHED
Studio	Sunrise
Source	Original work
Origin	Japan (Anime)
Genres	Action Mecha Mystery Psychological Sci-Fi
Themes	Amnesia Dystopian Noir Philosophy Butler Real Robot Politics Male Protagonist Kuudere Primarily Adult Cast Police

Reception

Community score	7.57 / 10
Bayesian score	7.58 / 10
Composite	59.4
On lists	4,575
Favourited	191 (4.2%)
Completion	90.0%
Drop rate	1.7%
In backlog	32.8%
Score spread σ	1.62

Score distribution

110243224325122616473738446938810140

Where it places

Cohort	Value	Tier	Rank
Broadcast season	Winter 2003	—	2 of 21
Year	2003	A	15 of 148
Studio	Sunrise	B	36 of 254
Genre	Mecha	A	39 of 484
Era	Early 2000s	A	65 of 687
Genre	Psychological	C	156 of 416
Genre	Sci-Fi	B	183 of 1,409
Genre	Mystery	C	196 of 652
Source material	Original work	B	202 of 1,732
Season (all years)	Winter	B	227 of 1,557
Genre	Action	B	493 of 2,765
Length	Single-cour	B	493 of 2,668
Format	TV series	B	671 of 3,322
Origin	Japan	B	1,068 of 7,157

Key staff

Director	Kazuyoshi Katayama, Masaru Oota
Series composition	Chiaki Konaka, Kazuyoshi Katayama
Character design	Keiichi Satou
Original creator	Hajime Yatate

AniList id 129608 · record updated 2026-08-27