How can I meet my idols?

I'm not sure which idols you're talking about, since not all of them offer handshake events, but buying their single that includes the handshake event ticket is the easiest. Or buying a photobook and going to that event? Some idols have time after their performance to meet fans, but again, depends on the group.

Everything above, but remember there were those incidents at handshake events before so security is tighter. It might be best to go with a friend who speaks Japanese. But there won't be handshake events for a while...