As most NMB and 48Group fans know, Yamada Nana is an essential member to NMB. But recently through NMB48's 4th anniversary Concert, she announced her graduation. Like Oshima Yuko did during the National Kohaku Utagassen, Nana decided to announce her graduation during a large scale event. To me, she wanted both her graduation and the years after to be memorable. As well as that during the announcemnt, she also announced that she would have a Twitter Account. Which she has alongside members like Sayanee and Milky~ So, like Yuko, even if she graduates (Which the graduation concert is on her birthday next year DX) we can keep in touch with her through Twitter~