official site is up for the new single. the site looks like a giant app menu,
https://r.helloproject.com/morningmusume/seisyun/http://www.helloproject.com/news/2722/Morning Musume. '15 thinks they are making a comment for a TV show called "Z.D.A"....but a surprise announcement
Morning Musume. '15's Simultaneous Nationwide Handshake events campaign is back! Handshake events will be held at the same time in prefectures across the country on two days, 4/16 and 4/17.
4/16
Hokkaido: Masaki Sato
Aomori: Ayumi Ishida
Miyagi: Haruka Kudo
Saitama: Haruna Iikubo
Tokyo: Mizuki Fukumura
Tokyo: Haga Akane
Kanagawa: Makino Maria
Shizuoka: Nonaka Miki
Aichi: Kanon Suzuki
Hyogo: Oda Sakura
Osaka: Ogata Haruna
Hiroshima: Riho Sayashi
Nagasaki: Erina Ikuta
4/17
Hokkaido: Masaki Sato
Miyagi: Ayumi Ishida
Nagano: Haga Akane
Saitama: Haruka Kudo
Ishikawa: Mizuki Fukumura
Tokyo: Nonaka Miki
Tokyo: Riho Sayashi
Tokyo: Haruna Iikubo
Kanagawa: Oda Sakura
Shizuoka: Kanon Suzuki
Aichi: Makino Maria
Osaka: Ogata Haruna
Fukuoka: Erina Ikuta
Masaki : Hokkaido -> Hokkaido
Ayumi : Aomori -> Miyagi
Kudo : Miyagi -> Saitama
Harunan : Saitama -> Tokyo
Mizuki : Tokyo -> Ishikawa
Akane : Tokyo -> Nagano
Maria : Kanagawa -> Aichi
Nonaka : Shizuoka -> Tokyo
Kanon : Aichi -> Shizuoka
Sakura : Hyogo -> Kanagawa
Ogata : Osaka -> Osaka
Sayashi : Hiroshima -> Tokyo
Eripon : Nagasaki -> Fukuoka
Z.D.A actually means Zenryoku Douji Akushukai (Simultaneously nationwide handshake event)
JJM stands for Juice=Juice Miyazaki Yuka (the announcer)
Mizuki, the only one going to Ishikawa prefecture, will probably get to ride the brand new Shinkansen train that opened last month.