Top Ten Most Mature Anime Series

Vote for the anime series that Older audiences wouldn't mind watching
The Top Ten
1 Berserk Berserk, also known as Sword-Wind Chronicle Berserk, is a Japanese anime television series that aired from 1997 to 1998. An adaptation of the manga Berserk, it comprises 25 half-hour episodes produced by Oriental Light and Magic and first aired on Nippon TV.
2 Death Note Death Note is a Japanese television drama anime series based on the manga series of the same name by Tsugumi Ohba and Takeshi Obata. The show is centered around Light Yagami - a promising highschooler and aspiring detective with a strong sense of "justice".
3 Black Lagoon Black Lagoon (stylized in all caps) is a Japanese manga series written and illustrated by Rei Hiroe. It has been published in Shogakukan's seinen manga magazine Monthly Sunday Gene-X since April 2002, with its chapters collected in twelve tankōbon volumes as of August 2021. In North America, the manga ...read more.
4 Monster Monster (Japanese: モンスター Hepburn: Monsutā, sometimes referred to as "Naoki Urasawa's Monster") is a Japanese manga series written and illustrated by Naoki Urasawa. Monster has been critically acclaimed, with the manga having won several awards and its anime adaptation being called one of ...read more.
5 Fullmetal Alchemist Fullmetal Alchemist is an anime series adapted from the manga of the same name by Hiromu Arakawa. It is about two brothers, Edward Elric and Alphonse Elric, trying to restore their bodies after failing at bringing their mother back to life. It aired in 2003 and was remade as Full Metal Alchemist Brotherhood ...read more.
6 Steins;Gate Steins;Gate is a 2011 anime television series created by the animation studio White Fox based on 5pb. and Nitroplus's 2009 video game of the same name, and is part of the Science Adventure franchise.
7 Hellsing Ultimate Hellsing is a Japanese manga series written and illustrated by Kouta Hirano. It chronicles the efforts of the mysterious and secret Hellsing Organization, as it combats vampires, ghouls, and other supernatural foes who threaten England.
8 Claymore Claymore is a dark fantasy manga series written and illustrated by Norihiro Yagi. The series initially premiered in the now defunct Monthly Shōnen Jump in the May 2001 issue, but was moved to one of their sister magazines as the content was deemed too adult for Shōnen Jump’s target demographic.
9 Fullmetal Alchemist: Brotherhood Fullmetal Alchemist: Brotherhood is an anime series adapted from the Fullmetal Alchemist manga by Hiromu Arakawa.
10 Attack on Titan Attack on Titan, also known as Shingeki no Kyojin in Japanese, created by Hajime Isayama, is one of the most popular Japanese anime series to be released. It was first watched in Japan during 2013 and was dubbed in English to be watched in America in 2014. It is best known for its emotional moments, ...read more.
The Contenders
11 Ergo Proxy Ergo Proxy is a science fiction suspense anime television series, produced by Manglobe, directed by Shukō Murase and written by Dai Satō.
12 Ghost in the Shell Debuting in 1995 as an anime film, Ghost in the Shell was based on a manga by Masamune Shirow. The franchise has since expanded into multiple series and films. It explores themes of identity, artificial intelligence, and existentialism through its protagonist, Major Motoko Kusanagi, a cyborg federal agent in a future Japan. The franchise has had a significant impact on cyberpunk culture and media.

Outstanding

13 Code Geass Code Geass: Lelouch of the Rebellion, often referred to as simply Code Geass, is a Japanese anime series created by Sunrise, directed by Gorō Taniguchi, and written by Ichirō Ōkouchi, with original character designs by manga authors Clamp.
14 Mushishi Mushishi is a manga series written and illustrated by Yuki Urushibara. It was serialized in Afternoon Seasons Zōkan from 1999 to 2002, and in Monthly Afternoon from December 2002 to August 2008. The individual chapters were collected and released into ten tankōbon volumes by Kodansha.
15 Elfen Lied Elfen Lied is a Japanese manga series written and illustrated by Lynn Okamoto. It was originally serialized in Shueisha's Weekly Young Jump from June 2002 to August 2005, with the 107 chapters collected into twelve tankōbon volumes.

How is Death Note above this? This anime makes Death Note look like it's G-Rated.

16 Cowboy Bebop Cowboy Bebop is a 1998 anime television series animated by Sunrise featuring a production team led by director Shinichirō Watanabe, screenwriter Keiko Nobumoto, character designer Toshihiro Kawamoto, mechanical designer Kimitoshi Yamane, and composer Yoko Kanno.
17 Neon Genesis Evangelion Neon Genesis Evangelion, commonly referred to as Evangelion or Eva, is a Japanese animated television series produced by Gainax and Tatsunoko Production, and directed by Hideaki Anno.
18 Trigun Trigun is a Japanese manga series written and illustrated by Yasuhiro Nightow. The manga was serialized in Tokuma Shoten's Shōnen Captain in 1995 with three collected volumes when the magazine was discontinued in 1997.
19 Highschool of the Dead Highschool of the Dead, known in Japan as Apocalyptic Academy: Highschool of the Dead, is a Japanese manga series written by Daisuke Satō and illustrated by Shōji Satō.

Lots of fan service and cussing, upskirts, gore, pervy characters etc.

20 Glitter Force Smile PreCure! (Japanese: スマイルプリキュア!, Hepburn: Sumairu PuriKyua!, lit. "Smile Pretty Cure!") is a 2012 Japanese anime television series produced by Toei Animation and the ninth installment in Izumi Todo's Pretty Cure metaseries, featuring the seventh generation of Cures. The series ...read more.
21 Serial Experiments Lain Serial Experiments Lain is an anime series that was directed by Ryutaro Nakamura. The characters were designed by Yoshitoshi ABe, the script was penned by Chiaki J. Konaka, and the production was handled by Yasuyuki Ueda for Triangle Staff. The series aired on TV Tokyo from July to September in 1998. It explores various themes such as reality, identity, and communication, using elements of philosophy,... read more
22 Hunter x Hunter Hunter × Hunter is a manga franchise created by Yoshihiro Togashi. In 1999, Hunter × Hunter was adapted into a 62-episode anime television series produced by Nippon Animation and directed by Kazuhiro Furuhashi. The show premiered on Japan's Fuji TV and ran until 2001. Three separate original video animations (OVAs) totaling 30 episodes were subsequently produced by Nippon Animation and released in Japan from 2002 to 2004. A second anime television series by Madhouse aired on Nippon Television from October 2011 to September 2014, with two animated theatrical films released in 2013. There are also numerous audio albums, video games, musicals, and other media based on Hunter × Hunter.
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