Ōsama-tachi no Viking

• Ja Kanji — 王様達のヴァイキング • Ja Romaji — Ōsama-tachi no Vaikingu

• Type — manga • Author — * Sadayasu • Makoto Fukami (collaboration) • Illustrator — Sadayasu • Publisher — Shogakukan • Magazine — Weekly Big Comic Spirits • First — March 4, 2013 • Last — August 26, 2019 • Volumes — 19

• Portal — yes Ōsama-tachi no Viking is a Japanese manga series written and illustrated by Sadayasu, with collaboration from Makoto Fukami. It was serialized in Shogakukan's seinen manga magazine Weekly Big Comic Spirits from March 2013 to August 2019, with its chapters collected in nineteen tankōbon volumes.

Kazuki Koreeda is an 18-year-old social outcast and high school dropout, unable to hold even a part-time job. His sole exceptional skill is his mastery of hacking. In a fit of rage, he orchestrates a cyberattack against a major financial institution. His actions draw the attention of Daisuke Sakai, a mysterious and wealthy angel investor, who offers Koreeda an audacious opportunity: to use his hacking prowess to achieve global domination. Forging an unlikely alliance, the reclusive hacker and the enigmatic investor embark on a mission to dismantle and reshape the world order.

Written and illustrated by Sadayasu, with collaboration from Makoto Fukami, Ōsama-tachi no Viking was serialized in Shogakukan's seinen manga magazine Weekly Big Comic Spirits from March 4, 2013, to August 26, 2019. Shogakukan collected is chapters in nineteen tankōbon volumes, released from June 28, 2013, to September 30, 2019.