Hyakutaro Ichimonji (一文字 百太郎, Ichimonji Hyakutarō) is a recurring support character from the Metal Slug games since Metal Slug 2.


Hyakutaro is a living-legend, who takes disguise as a POW to help in the battlefield against the Rebel Army. He is able to channel a strange light energy from his palms, then releasing it in a burst.

Once the player frees him from captivity, he will follow them around, launching projectiles which home in on enemies, dealing considerable damage. The energy burst also inflicts damage to any enemy caught in its direction.

Unfortunately, if the player dies, he will stop following and run off screen. He also stops following when the player enters a new area of the mission.


Other Appearances

Metal Slug: 2nd Mission

Hyakutaro is a hidden boss found in Mission 18 (Pursuit). He fights by shooting slow homing energy balls from his palms. Once he's defeated, Hyakutaro gives the Iron Knuckle to the player and is added to the game's POW list. He is ranked as a Super Devil in this game, whereas other games has him as a 2nd Lieutenant.

Metal Slug Defense

Hyakutaro is a purchasable unit in this game. He attacks by kicking when in close range and shoots homing energy balls in long range. His special attack is firing five energy balls.

Metal Slug Attack

Hyakutaro returns in this game. Hyakutaro pieces can be earned through the POW Shop and the Normal/Extra Shop. Hyakutaro can now shoot ten energy blasts.

In both games, various entities of Hyakutaro exist, each one having their own ways of using their energy. It is unknown what relation (if any) they have to Hyakutaro.

Crossover Appearances

Neo-Geo Battle Coliseum

Common Fixture.gif During one of Marco Rossi's Supers he is able to summon Hyakutaro into battle. Once he arrives Hyakutaro will wander around until Marco makes contact with him after which he will charge a powerful energy blast at a random time after contact is made. This provides some unpredictable assaults upon the opponent. The blast is extremely powerful, and he can charge it as soon as he is provoked by the opponent.


  • Hyakutaro possibly plays homage to Ryu from Street Fighter, as he uses a special attack similar to the Hadouken.
    • It also resembles the energy projectiles seen in Akira Toriyama's Dragonball series.
    • The energy burst seem from his palms also bears a resemblance to Andy Bogard's Hishouken, from The King of Fighters.
  • His name is possibly a play on Hayato Ichimonji, the second main protagonist of the original Kamen Rider.
  • There is an artwork in Metal Slug Anthology where he is a rebel in disguise using his signature attack.
  • He was supposed to appear in Metal Slug Advance but for some reason it ended as unused. He still appears in a collectible card.
  • "Hyaku" means "one hundred" in Japanese. Hyakutaro's variants in Metal Slug Defense and Metal Slug Attack are named after their download milestones.


Heroes Main Series Marco Rossi | Tarma Roving | Eri Kasamoto | Fio Germi | Trevor Spacey | Nadia Cassel | Ralf Jones | Clark Still | Leona Heidern
Spin-Offs Walter Ryan | Tyra Elson | Hero | Gimlet | Red Eye | Tequila
Mobile Roberto Nicola | Nathalie Neo | Alisa Stewart | Helton | Tilde | Nikita | Matilda | Amir | Whip | Heidern
Support Hyakutaro Ichimonji | Rumi Aikawa | Madoka Aikawa | Utan | Navel | Selina | Issenman Tarou | Eris | Hyakumantaro | Pupipi
Villains Main Series Donald Morden | Allen O'Neil | Abul Abbas | Rootmars | Doctor | Avatar of Evil | Invader King
Spin-Offs Allen Jr. | Oguma | Macba | Lt. Wired | Kanan | Hilde Garn
Mobile Unknown Alien | Victor | Ptolemaios | Anubis the Chained
Instructors Sophia Greenville | Margaret Southwood | Riviera von Wittenberg | Maryell von Wittenberg | Cynthia Hartnett | Anne
NPC Announcer | POWs | Duke Koudou | Satiko Suzuki | Gerhardt City Civilians | Scott Amundsen Jr. | Miner | Genie of Lamp | Orca | President | Survivors | Fishman | Lumberjack | Sailor | Chinese Soldier
Crossover KOF Team | Battle Cats
Unused Phil Gene | Michiko Nakajima | Angry Man | "Achilles" | "Tabomba"
Metal Slug Attack
Regular Army Associates MS-Alice | Anna Wiese | Midori Schumann | Mello | Rita Lewinsky | Amber | Nikita | Reika Bradford | Louise | Gisee | MS-Heart | Ashley | Rocky | Growl | Jephet | Victoria | Claudia | Kanae | Howell
Metal Device Project Perche | Ami | Molly | Menzel | Ulala | Maggie | Avvio | Quaith
Rebel Army Associates Rapid | Julia | Chloe | Izabella | Edda | Growth & Cline | Naomi | Alesha | Jane Doe
ACE Abigail | Dion | Romy | Kriemhild | Katalina
"Frozen Brigade" Beatriz | Vicky | Dolores
Blaze Brigade Grazia | Loretta | Norah
Allen Platoon Destrade | Huracan | Conny | Nantes | Padwah
Science Department Vita | Navy | Nova | Emma | Millefie
Arabian Army Shizuka | Aisha
Ptolemaic Army Rebellion Dragunov | Yoshino | Caroline | Veronica | Sisilia | Towa | Simon | Miharu | Chunyan | Owen | Sho | Lucy | Phoebe | Josette | Mizuna | Matilda | Little Lady Black | Svetla | Humphrey | Lithos | Yutong
Cultists Mira | Maria | Damian | Achetto | Sally | Cara | Oao-One
Secret Sect Anastasia IV | Believers | Beecham | Melvina | Anastasia I
Space Army Martians Professor | Mars People Neo | Percier | Clone Abby | Clone Betty | Mars People Rangers | Ariadna | Gemini Twins | Halle | Bonny | Clario | Harriot | Code Marionette:Un | Pauline | Leone | Claris
Invaders Odette | Annette | Lydia | Nowan | Schwarz Metzelei | Fedeln Metzelei | Rillacle | Franke | Teleko | Bloom Metzelei | Odile | Bersek | Geweih Metzelei | Purple King | Barbeln | Biene Goldenes
Independent Army Amadeus Syndicate White Baby | Alma | Iron Fortress | Valerian Bears | First Baby | Type:Ant-Lion
Red Goblin Society Scotia Amundsen | Red Goblin | Vatn | Jin | Aileen | Elena | Licht | Ichima
Mummy Army Pharaoh | Cleopatra | Hemet | Arsinoe | Hathol | Sharifa | Ramal
Vampires Aswang | Agalia | Sharl
World Military Corp. Kelly | Maya | Mirror Mantis
Independents El Dorado | Elysion | Esther | Teresa | Minerva | Yang Dao | Otto | Yuki Tsuki Hana
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