Hello there!
I've just finished reading hoozuki no reitetsu and was wondering if anyone could recommend something just as funny. I also really liked saiki kusuo no psi nan. I've already kept up to date with gintama as well. XD

Thank you~

Criminale. Bo bo bo bo.

There's a long list of comedic manga so I narrowed it down to my favourites instead
Grand Blue
Danshi Koukousei no Nichijou
Takane to Hana
Seigi no Mikata
Gekkan Shoujo Nozaki-kun
Hope you enjoy reading them as much as I do!

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Asleep

I haven't really read any of the ones you said you liked... but here are some of my favourite comedy manga.

Maou-jou de Oyasumi
D-Frag!
Seitokai Yakuindomo
Inugami-san to Nekoyama-san
Kobayashi-san Chi no Maid Dragon
Mikakunin de Shinkoukei
Monster Musume no Iru Nichijou
Ojojojo
Komori-san wa Kotowarenai!
Fullpapla (What? I like COOL Kyoushinja?... How could you guess)
Takane no Hana Nara Ochitekoi!!

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~4400 manga completed
~1700 ongoing...

Choku!, Eensy-Weensy Monster, Haru to Natsu, Honto no Kanojo, Hoozuki-san Chi no Aneki, Majo to Houki to Kurobuchi Megane, Okama Hakusho, Poor Poor Lips, Stop!! Hibari-kun!, The Voynich Hotel and Transfer Student Storm Bringer