Top Definition
Someone who wants to be noticed by Senpai.
I'm senpai's kouhai... why won't senpai notice me?!
by Anon006 November 20, 2012

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A "kouhai" is your junior at work, school, or a group. Usually they belong to the same organization as you but they entered the organization after you. A "kouhai" could also be someone who has entered the same "industry" as you but at a later date. In this case "industry" has a very broad meaning, e.g. the entertainment industry, a professional sports league.
A sempai with a kouhai, an elder student with a younger student. Senior (Sempai/Senpai) with a Sophmore (Kouhai).
by M. Massacre November 09, 2010

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