Definitions by MadeOfMush

Hikikomori 

A hikikomori is someone who rarely, if ever, leaves their home or room. They withdraw from society and have few friends.

Hikikomori also tend to indulge in otaku-esque interests, such as anime and manga and more than likely tend to be NEET.

When one refuses to leave their home for over six months, they are technically a hikikomori.

Hikikomori by MadeOfMush September 5, 2011