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Pairing: Iwaizumi Hajime/Oikawa Tooru
Alternative name(s): IwaOi
Gender category: Slash
Fandom: Haikyuu
Canonical?: no
Prevalence: High
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IwaOi, or Iwaizumi Hajime/Oikawa Tooru, is a popular slash ship in the fandom Haikyuu.


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Oikawa and Iwaizumi are childhood friends. Iwaizumi is known as Oikawa's "pillar". Oikawa is the leader of captain of Aoba Johsai's volleyball team and is widely regarded as the ace setter. Iwaizumi is the volleyball team's ace, vice captain and a wing spiker. Oikawa always calls him "Iwa-chan," to his annoyance, and Iwaizumi calls him "Shittykawa, Trashykawa, Dumbass," etc. in return. Oikawa often makes fun of Iwaizumi for his shorter height.

Together with Matsukawa Issei and Hanamaki Takahiro, they make up the Aoba Johsai third years in the volleyball team, most commonly known as the 'Seijou Third Years'.

'The fight isn't over,' an extra chapter in Haikyu!! volume 17, is a very important Chapter to IwaOi fans. In an extra four-panel comic strip in Volume 17, they are shown to be quite competitive with each other as when they race each other, neither of them were willing to let the other take the lead.

In their last match against Karasuno before graduation, Oikawa's last toss was to Iwaizumi. They go to different universities after graduating from Aoba Johsai.


This article or section needs expansion.

Iwaoi is in one of the most popular ships in Haikyuu. As of 2019, there are over 8600 works on AO3, and is the most tagged ship, a position previously held by Kagehina.

Common Tropes & Fanon

  • Future Fic: College era works are popular in the HQ fandom. In canon, they go to different universities, which may lead to angst.
  • Childhood Friends/Friends to Lovers: The two have been best friends since childhood.
  • Pining: related to Friends to Lovers. Either or both of them have romantic feelings that they believe are unrequited or a threat to their friendship.



Fanart & Fancomics


Communities & Resources