"The Ace's Duty" (Japanese: エースのさだめ Ēsu no Sadame) is the three hundred thirtieth chapter of the Haikyū!! series, written and illustrated by Haruichi Furudate. It was published in the 2nd issue of Weekly Shōnen Jump’s 2019 series.


Mujinazaka shows off their top-notch offense and defense skills as they dominate the match. Meanwhile, Fukurōdani is struggling even with Bokuto in peak form. Perhaps, the problem lies with Akaashi.


Bokuto successfully receives Kiryū's spike with his chest, and Washio capitalizes on the moment to score for Fukurōdani. However, Kiryū quickly thwarts Fukurōdani's progress with a dominating spike and two powerful serves specifically aimed at Bokuto. Fukurōdani is forced to take a time out as Mujinazaka leads by four points. Meanwhile, Kuroo recognizes that Bokuto is being heavily targeted and pleads for his friend to not fold under pressure.

Some time after the match resumes, Bokuto approaches for a sharp straight only to find his spike being cleanly blocked by Unnan. It turns out that Mujinazaka's blockers are marking the trajectory to counter Bokuto's straights as well as forcing him to spike toward the center of the court where their libero is situated. Using such tactics, Mujinazaka successfully restricts Bokuto and gains a huge lead of 17 - 12 over Fukurōdani. In the subsequent play, Sarukui skillfully receives a difficult serve from Usuri. As Akaashi prepares to toss, he switches to a dump shot at the last moment. However, Usuri reads his intention and alerts his teammates. Unnan and Ezota put up a two-man block and shut down Akaashi's dump shot to widen the point gap even more.


Chapter notes

Character revelations

  • Unnan's given name is revealed to be Keisuke (惠介). 
  • Unnan and Mami are known as "Mujinazaka's Twin Towers" for their roles as the pillars of defense. 


  • This chapter referenced Earvin N'Gapeth after Bokuto's chest receive, possibly due to their tendency for unorthodox plays.


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Karasuno High Team Formation Arc
Interhigh Arc
Tokyo Expedition Arc
Spring High Preliminary Arc
Tokyo Nationals Arc
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Final Arc
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