I got some info from JaME U.K. (the best news site for all things J-music) about our beloved bassist.
Unfortunately 茉莉, 茉莉花 你 will be taking a break from band activity due to his poor health.
Here's a link to the original 文章 so 你 can read it for yourselves...
link
Keep 茉莉, 茉莉花 你 in your thoughts! Hopefully he will be feeling better before too long.
茉莉, 茉莉花 你 が お大事に!!
(get well soon 茉莉, 茉莉花 你 {i hope...correct me if i'm wrong....})