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. 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

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, but the time he will charge is totally random (he can shoot as soon as he enters the screen, or take almost 10 seconds to shoot).


  • 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.
  • 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. It still appears in a collectible card.
  • "Hyaku" means "one hundred" in Japanese. Hyakutaro's variants in Defense and Attack are named after their download milestones.


Heroes Marco Rossi | Tarma Roving | Eri Kasamoto | Fio Germi | Trevor Spacey | Nadia Cassel | Ralf Jones | Clark Still | Leona Heidern | Walter Ryan | Tyra Elson | Roberto Nicola | Nathalie Neo | Alisa Stewart | Hero | Gimlet | Red Eye | Tequila | Amir | Whip (Seirah)
Support Hyakutaro Ichimonji | Rumi Aikawa | Madoka Aikawa | Utan | Navel | Issenman Tarou | Eris | Hyakumantaro | Heidern
Villains Donald Morden | Allen O'Neil | Abul Abbas | Rootmars | Amadeus | Evil Spirit Incarnate | Ptolemaios | Invader Queen | Allen Jr. | Oguma | Macba | Lt. Wired | Kanan | Hilde Garn | Unknown Alien
Instructors Sophia Greenville | Margaret Southwood | Riviera von Wittenberg | Maryell von Wittenberg | Cynthia Hartnett
NPC POWs | Parker | Satiko Suzuki | Gerhardt City Civilians | Scott Amundsen Jr. | Miner | Genie of Lamp | Orca | President | Fishman | Sailor | Chinese Soldier
Cameos KOF Team | Battle Cats
Unused Phil Gene | Michiko Nakajima | Angry Man | Achilles | Tabomba
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