TL;DR version:
Here's what 2017 was:
L: Kotoe Inoue, Mako Kobata, Arisa Sato, Miku Torigoe
S: Koyomi Tominaga, Miya Sato, Haruka Miyashita, Misaki Tanaka
MB: Erika Araki, Mai Okumura, Nana Iwasaka, Haruyo Shimamura, Ayaka Matsumoto, Kana Ono
OH: Risa Shinnabe, Yuki Ishii, Risa Ishii, Sarina Koga, Mami Uchiseto, Yurie Nabeya, Saori Takahashi, Arisa Inoue, Mizuki Tanaka, Ai Kurogo
OP: Rika Nomoto, Mari Horikawa, Miyu Nagaoka
Here's what 2018 should be:
L: Arisa Sato, Kotoe Inoue, Mako Kobata, Yumi Nakagawa
S: Koyomi Tominaga, Haruka Miyashita, Momoko Higane, My little Sweet Pea Airi Tahara
MB: Erika Araki, Mai Okumura, Nana Iwasaka, Kana Ono, Aika Akutagawa
OH: Yuki Ishii, Sarina Koga, Mami Uchiseto, Yurie Nabeya, Rika Nomoto, Arisa Inoue, Ai Kurogo, Miwako Osanai, Rei Kudo
OP: Miyu Nagaoka, Risa Shinnabe, Mizuki Yanagita
Here's what the team looks like: 2018 Japanese NT