Shogakukan 's web comic magazine Ura Sunday announced in its Manga ONE app that Yabako Sandrovich 's Kengan Ashura manga will receive an anime adaptation. The series earned 2,363,895 votes to win a fan contest and receive the adaptation. The anime will begin development, and the app and magazine will announce details in the future.

The app's users chose from the titles Ura Sunday currently serializes and voted a total of 9,085,018 times for eligible manga. The app updated the contest's ranking list daily, and voting closed on April 30. Kengan Ashura ranked #1 on the app's top 15 list in January, soon after voting opened.

Manga that have already been adapted into anime or live-action projects, including Shinobu Ohtaka and Yoshifumi Ōtera 's Magi: Sinbad no Bōken , Shohei Manabe 's Ushijima the Loan Shark , and Tamiki Wakaki 's The World God Only Knows , were disqualified. People voted up to once every 12 hours to choose the manga to get an anime.

Sandrovich launched Kengan Ashura with Daromeon 's illustrations in 2012. Shogakukan released the 12th compiled book volume in Japan in April. The first digital volume is available for Amazon 's Kindle devices for free until May 11.

In the manga's story, businesses and merchants wager large sums of money to hire combatants for unarmed hand-to-hand fighting matches. The winner takes all in these Kengan competitions that originated during the Edo period. Merchants use the fights as a means to resolve disputes with each other.

The strong and mysterious Ōma Tokita, whose nickname is Ashura, enters these matches. Nogi Group president Hideki Nogi keeps his ambitions to himself when he meets Ashura. Events begin to swirl around the Kengan fights as Ashura enters the fray.