Top 5 Anime Like The Big O [2026 List]

5. Taka no Tsume Yoshida-kun Batten File: Natsuyasumi Mystery Adventure

Taka no Tsume Yoshida-kun Batten File: Natsuyasumi Mystery Adventure has finished airing and it has 5 Episodes. It is also Known as: 鷹の爪 吉田くんの×（バッテン）ファイル～夏休みミステリー・アドベンチャー～, Taka no Tsume Yoshida-kun Batten File: Natsuyasumi Mystery Adventure

4. Yurei Deco

The story begins when Berry, an average girl from an average home, meets Hack, a girl who looks like a boy. Charmed by Hack, Berry meets up with the team Hack leads, the Ghost Detectives Club. Members of this club are “socially dead,” working invisibly within the digitally controlled society of Tom Sawyer. As she works with the group, Berry learns about Zero, a mysterious figure who lurks within Tom Sawyer’s underground. She and Hack decide to chase down this figure, and in time, the truth behind the city is revealed...

Yurei Deco has finished airing and it has 12 Episodes. It is also Known as: ユーレイデコ, Yurei Deco

3. The Big O

Paradigm City is a place without a past. 40 years ago, something happened that wiped the memories of everyone in it. Unfortunately, the people of Paradigm City were very busy before then, making Megadueses (giant robots) and monsters. People who were born after the memory wipe are gaining/recovering memories of the past and using them to build newer threats. With the help of The Big O (a faithful giant robot), his butler Norman and the android Dorothy, Roger Smith keeps Paradigm City safe. As problems mount and more memories surface, Roger's past and Paradigm's future begin to become suspect...

The Big O has finished airing and it has 26 Episodes. It is also Known as: THEビッグオー, Big O Roger, Big O

2. The Melancholy of Haruhi Suzumiya Season 2

Kyon has found himself dragged through many adventures as of late—all because of the SOS Brigade club and its excitable leader, Haruhi Suzumiya. He has stopped believing in the supernatural long ago, but after being forced to join this club based solely on that, he has seen things that cannot be explained logically.

Joining Kyon on his various misadventures is the shy and soft-spoken Mikuru Asahina, the bookish Yuki Nagato, and the ever-cheerful Itsuki Koizumi. Whether it is summer vacation or a school festival, things involving their club and Haruhi herself always end up becoming strange.

The Melancholy of Haruhi Suzumiya Season 2 has finished airing and it has 14 Episodes. It is also Known as: Suzumiya Haruhi no Yuuutsu (2009), 涼宮ハルヒの憂鬱, Suzumiya Haruhi no Yuutsu (2009), Endless Eight, The Sigh of Haruhi Suzumiya

1. The Melancholy of Haruhi Suzumiya

Kyon, your typical high school student, has long given up his belief in the supernatural. However, upon meeting Haruhi Suzumiya, he quickly finds out that it is the supernatural that she is interested in—aliens, time travelers, and espers among other things. When Haruhi laments about the lack of intriguing clubs around school, Kyon inspires Haruhi to form her own club. As a result, the SOS Brigade is formed, a club which specializes in all that is the supernatural.
Much to his chagrin, Kyon, along with the silent bookworm, Yuki Nagato, the shy and timid Mikuru Asahina, and the perpetually smiling Itsuki Koizumi, are recruited as members. The story follows the crazy adventures that these four endure under their whimsical leader, Haruhi. The story is based on the light novels by Nagaru Tanigawa.

The Melancholy of Haruhi Suzumiya has finished airing and it has 14 Episodes. It is also Known as: Suzumiya Haruhi no Yuuutsu, 涼宮ハルヒの憂鬱, Suzumiya Haruhi no Yuuutsu