 If you liked
Shijou Saikyou no Deshi Kenichi
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 ...then you might like
Aiki
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Martial arts of various styles, insanely skilled masters, comedy and ecchi. If you ever wanted to read HSDK without Kenichi; replaced by egomanical, perverted bastard who doesn't suck at martial arts and can get with the ladies, AIKI is it.
Both are fighting shonen and have detailed explanation of technique and styles of various martial arts.
The great difference is that in Aiki the Hero is already a master and in History's Strongest Disciple Kenichi the Hero is learning from many different masters.