In the interview she talks about a mail she had received from her parents when she moved to Tokyo from Kyoto, her hometown.
(cause Fujiterebi is in Tokyo..) And she was deeply touched by the mail.
In the mail were things to do while she lives alone in tokyo, such as not to forget thanks to everyone, 50 sit-ups everyday, and many other things which helped her a lot..
and for the first time she saw her mother crying when she moved. It was her 16.
She just went so emotional as talking about family.
I'v uploaded the special video, too. Find it in the shared folder. (in the original link.)