I notice there's quite a few here.
Pure curiosity. Perhaps to obtain some minor statistical knowledge as well.

1) How did you end up as a hikikomori?
2) For how long have you been a hikikomori?
3) How severe is your hikikomori condition?
4) How can you afford the hikikomori lifestyle?
5) Why do you continue staying as a hikikomori?
6) If you have successfully escaped your hikikomori lifestyle, what where the events that lead to that?

Also, to people who have the urge to persuade hikikomori to break out of their lifestyle, keep in mind that although such words may be inspiring, helpful, and/or motivating, simply saying something is an extremely simple thing to do.