Apocalypse Zero

• Ja Kanji — 覚悟のススメ • Ja Romaji — Kakugo no Susume • Genre — Action, post-apocalyptic

• Type — manga • Author — Takayuki Yamaguchi • Publisher — Akita Shoten • Imprint — Shōnen Champion Comics • Magazine — Weekly Shōnen Champion • First — July 1994 • Last — August 1996 • Volumes — 11

• Type — ova • Director — Toshiki Hirano • Producer — Hiroshi Kato Shin'ichi Hirai Shirō Sasaki • Writer — Akiyoshi Sakai • Music — Takashi Kudō • Studio — Ashi Productions • First — October 23, 1996 • Last — December 18, 1996 (cancelled) • Runtime — 45 minutes (each) • Episodes — 2 (10 were planned)

• Type — manga • Title — Exoskull Zero • Author — Takayuki Yamaguchi • Publisher — Akita Shoten • Magazine — Champion Red • First — 2010 • Last — 2015 • Volumes — 8 Apocalypse Zero, known in Japan as Encouragement of Resolve, is a manga series written and illustrated by Takayuki Yamaguchi. It was serialized in Akita Shoten's Weekly Shōnen Champion from July 1994 to August 1996. The manga was adapted into a two episode original video animation in 1996, animated by Ashi Productions and produced by Big West (advertising agency), Victor Entertainment and Tomy.

Kakugo and Harara are brothers trained by their father, Oboro, to slay monsters that have begun roaming the streets of a post-apocalyptic, 21st century Tokyo following a devastatingly, powerful earthquake. To aid them in their quest, Oboro entrusts his two sons with Fortified Armor Shells, cyborg exoskeletons forged using the souls of deceased warriors by their grandfather, a former scientist of the Imperial Japanese Army during World War II, Shiro Hagakure. However, Harara becomes possessed by a mysterious evil from deep within his armor, mutating his body as well as filling him with a desire to destroy all of mankind to help cleanse the Earth of contamination. Some years later, Kakugo moves to "Reverse Cross High School", located in one of the ruined districts of Tokyo near the castle from which Harara commands their demon army. It is now up to Kakugo to defeat his evil sibling and put a stop to their wicked legions.

• Kakugo Hagakure: • The main protagonist of the series, owner of the Fortified Armor Shell known as 零(ぜろ). Unlike Harara, Kakugo stuck to his duty to protect innocent citizens in trouble. This leads to several encounters with a large number of monsters which inhabit the city until finally he comes face-to-face with Harara himself. Kakugo is a stern and humorless, yet compassionate and honorable person, wearing glasses and a white uniform inspired by the regimental uniforms worn by the Imperial Japanese Navy. Kakugo is a master of the Reishiki Bōei-Jutsu of martial arts and has eight steel balls embedded in his body, which he can absorb into himself to coat his skin in metal or eject from his body to use as weapons. His signature technique is Impact (lit. "cause and effect"), which is a counter move that redirects all of the energy of an opponent's attack back to them. Zero is mentioned to be the prototype for all other Fortified Armor Shells and is inhabited by the vengeful souls of the 3000 Japanese soldiers sacrificed to create it. The spirits within Zero form a collective consciousness, manifesting as a mass of grimacing skulls, and are able to communicate with Kakugo and advise him in battle. • His armored form resembles a red-eyed tokusatsu superhero with a long scarf similar to the Kamen Rider series. • Capcom artist Kinu Nishimura had said that Kakugo was the main inspiration for Cyberbots: Full Metal Madness protagonist, Jin Saotome. • Kiyotaka Ishimaru from the Danganronpa franchise bears resemblance to Kakugo. • Harara Hagakure: • Kakugo's older brother and the main antagonist of the series. Harara possesses the Fortified Armor Shell Kasumi. Bonding with Kasumi caused his body to assume a hermaphroditic form and drove him to insanity, killing his father Oboro in combat and defeating Kakugo. Believing humanity responsible for the death of the environment, he has become determined to destroy all humans with the aid of beings known as Tactical Fiends. Like his brother, Harara has multiple steel balls embedded in his body which he can absorb to coat his body in metal and increase his strength. His signature technique, Spiral, draws energy from the Earth into a strike that can force an opponent's internal organs to violently erupt from their body. The Fortified Armor Shell Kasumi has a feminine form and is inhabited by the malicious spirit of Mei Inukai, whose endless hatred for humanity after her infant son was sacrificed during Kasumi's creation drives Harara's desire to exterminate humanity. • After Kakugo defeats the Tactical Fiend Eikichi, Harara directly possesses Eikichi's body in an attempt to finally destroy Kakugo. In the ensuing battle, Kakugo manages to emerge victorious over his sibling, leaving Harara in a coma for most of the manga.

• Tomohisa • Voiced by: Yuzuru Fujimoto (Japanese) • Harara's adviser. He later gains the ability to transform into a winged lion. • Kagenari • Voiced by: Kenichi Ogata (Japanese); Terrence Stone (English) • An executive at Harara's fortress. He is responsible for reporting the threat of Kakugo to him. He also stores the Kasumi armor inside his body. • Boruto: • Harara's Security Chief. Originally an elderly human who tried to defeat Harara, he was turned into a samurai armor-clad demon. He later dons the Fortified Armor Shell 震 (しん), empowered by the souls of 400 of Harara's defeated soldiers, to fight Kakugo. • Rai • Voiced by: Ryōtarō Okiayu (Japanese); Doug Stone (English) • Harara's Security adviser, a musclebound human who tried to defeat him, but was converted to his cause. He delivers fighters for Harara to kill at his fortress. He is adorned with the same steel balls and Kakugo and Harara, but the sheer number embedded in his body allows him to coat more of his skin in metal and assume a demonic armored form. • Chidokuro • Voiced by: Shigeru Chiba (Japanese); Tony Pope (English) • The general of the Tactical Fiends, a cowardly mustachioed man in a dark helmet (based on Berserks Femto). He manages to transform Kakugo into a Tactical Fiend only to be killed by Kakugo when he reverts to being a human.

• Hamuko: • A large, obese monster with clown-like features and the first Tactical Fiend Kakugo encounters. She enjoys killing females outright and consuming the men with them. She also wears the faces of her most recent victim as a pasty. Although initially attempting to simply subdue her, Kakugo finally kills her after disabling her powers. • Dogumakuro • Voiced by: Ryōtarō Okiayu (Japanese); Derek Stephen Prince (English) • The third Tactical Fiend encountered (second in the OVA), Dogumakuro is a mutant rock star capable of electrocuting his opponents with his tongue. He can also deploy a microphone from his groin that emits powerful music waves. Kakugo manages to overcome his techniques and defeats him by shattering his skull and evaporating his body. • Eikichi: • An elderly Tactical Fiend who is sent to attack Kakugo. He can solidify his saliva and form weapons with it, and his penis is a dragon head with the same skill. Though he manages to gain the upper hand against the unarmored Kakugo, he is quickly defeated once Kakugo gains his Zero Armor. His body is then possessed by Harara, though since he has already died by this point, rigor mortis sets in, allowing Kakugo to gain the upper hand and defeat him, incapacitating Harara. • Megumi: • Taking on the form of a nurse, Megumi is a Tactical Fiend who attempts to seduce men before killing them. In her monster form, she has large breasts that serve as tentacles, and is capable of full regeneration. Kakugo kills her by fully dismembering her.

• Oboro Hagakure: • The father of Kakugo and Harara who was responsible for their training. After Harara is driven to insanity by bonding with Kasumi, he demands to fight his father. Oboro dons his own Fortified Armor Shell, 雹(ひょう), and is killed in the ensuing duel. • Shiro Hagakure • The grandfather of Kakugo and Harara, who created the Fortified Armor Shells and the Tactical Fiend technology for Japan to win the Pacific War, causing thousands of deaths through his brutal and inhumane experiments. He was said to be executed by the Japanese government to cover up his experiments, but he secretly survived thanks to his science. • Mei Inukai • A nurse working for Shiro Hagakure, wife to a Japanese Imperial soldier named Shinobu Inukai. Both of them were murdered to use their son Tamataro for the creation of the Kasumi armor, but Mei's grudge reached the armor and infused it with hate towards humanity. It was only dissipated after Kakugo destroys the armor and Tsumiko redeems Tamataro's spirit through her love.

The Apocalypse Zero manga series was written and illustrated by Takayuki Yamaguchi. It was originally serialized in the Akita Shoten magazine Weekly Shōnen Champion from 1994 to 1996. A total of 11 tankōbon (chapter collections) volumes were published by Akita Shoten. An English translation of the manga was published as a graphic novel in the US by Media Blasters beginning on January 19, 2005. The manga was sold shrink wrapped, presumably due to the large amount of violence. Only six of the original 11 volumes were translated and released, as Media Blasters chose to cease publication of the series in early 2007. The manga was published in Italy by Dynamic Italia, flipping it in a left-to-right format. From 2010 to 2014, Yamaguchi wrote Exoskull Zero, a reboot of Apocalypse Zero featuring a similar protagonist in a slightly different plot. It was published in Akita Shoten's Champion Red magazine. From 2015 to 2021, Yamaguchi wrote Efu no Shichinin ("The Seven of Efu"), a prequel of Exoskull Zero.

The Apocalypse Zero anime OVA was co-produced by Victor Entertainment, Tomy and Big West (advertising agency), it was animated by Ashi Productions and directed by Toshiki Hirano. It was released in Japan in two volumes from October 23, 1996, to December 18, 1996, on VHS and Laserdisc. The OVA was planned to have ten episodes, but was canceled after the completion of the second episode. The reasons for the OVA's cancellation are currently unknown. The anime was released in Italy in 1999 on VHS, licensed by Dynamic Italia. The US license for Apocalypse Zero was acquired by Media Blasters who created a dubbed English language version of the anime translated by Takashi Sakudo and produced by Bang Zoom! Studios. The two VHS volumes were released from June 20 to August 22, 2000. A DVD release containing both episodes was released on August 28, 2001. A Region 2 DVD of the series with both episodes was released in Japan by Toshiba in 2003.

A video game based on Apocalypse Zero was released on the PlayStation on March 21, 1997, exclusively in Japan by Tomy. The game is a standard 3D fighting game allowing the player to go head-to-head against the CPU or against another player. It features seven characters to choose from based on both the anime and manga, and animated cut scenes taken from the OVA.

The Japanese title is an allusion to An Encouragement of Learning (Gakumon no Susume) from Fukuzawa Yukichi, an important early Japanese advocate during Meiji Restoration.