est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Hydra is the story of a former cop infiltrating the mob so that he can get his revenge over them for killing his mother & father while leaving his sister in a vegetative state.
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections
Volumes
SCオールマン First edition
1vols · 1998-08
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Fist of the North Star
北斗の拳
1984 · 武論尊, 原哲夫 · 127vols · Shōnen
Sci-FiActionGoreDramaPost-Apocalyptic
Keiji
花の慶次
1990 · 原哲夫, 隆慶一郎, 麻生未央 · 74vols · Shōnen
Historical
Fist of the Blue Sky
蒼天の拳
2001 · 武論尊, 原哲夫 · 38vols · Seinen
ActionWarMartial Arts
花の慶次 : 雲のかなたに
2020 · 原哲夫, 隆慶一郎, 麻生未央 · 30vols · Shōnen
Kagemushatokugawaieyasu
影武者徳川家康
1994 · 原哲夫, 隆慶一郎, 会川昇 · 25vols · Shōnen
ActionAdventureMilitaryPeriod DramaHistorical
いくさの子
原哲夫, 北原星望 · 17vols · Seinen
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Sengoku Strays
戦國ストレイズ
七海慎吾 · 15vols · Shōnen
ActionAdventureTime TravelDramaFantasy
Angel/Dust
エンジェル/ダスト
七瀬葵 · 1vols
ActionDramaFantasy
Hellhounds: Panzer Cops
犬狼伝説
藤原カムイ, 押井守 · 6vols
Sci-FiActionDystopianMilitaryTragedy
Samurai Legend
柳生秘帖風の抄
谷口ジロー, 古山寛 · 1vols
ActionGoreDramaHistorical
Shikaku: Urami Aoi
刺客怨み葵
さいとう・たかを, 工藤かずや · 4vols · Seinen
Action
Crimson Grave
クリムゾングレイヴ
三宅大志 · 11vols
ActionAdventureEcchiComedyFantasy