usagi_no_kami

Mina Asakura
Akiho Yoshizawa
Saya Tachibana
Natsumi Kamata
Miyu Watanabe
Anri Sugihara
Karin Ogino
Mari Okamoto
Maho Uruya
Arisa Kuroda
Momoko Yoshida

Couldn't check:
Ayaka Sayama ( blog only readable with a smartphone able to read those square things?)

Update from part 1:
Sayuki Matsumoto is confirmed okay..... leaving only Yuko Ogura and Kana...

Sayuki Matsumoto has blogged that she is okay!

Still no word on Yuko Ogura or Kana Tsugihara.

EDIT: I found a twitter that might be Yukorin :
yukorin_o

Losts of pics of food... a couple of her, but I believe I've also seen them on her GREE blog.
Lots of followers... not sure if...

Some more names to add to the list:
Aki Hoshino
Mui Kuriyama
Kokomi Naruse
Suzuka Morita
Sayaka Tashiro
Akina Aoshima
Yuki Asakura
Maya Koizumi
Noriko Iriyama
Misato Takamatsu
Minami Fujioka
Rurika Yokoyama
Haruka Andou
Kanna Arihara
Mayuka Okada
Azusa Yamamoto

Update from pt. 1:
Shizuka Nakamura is safe.

A few more names to add to the list of Idol who have blogged since the Earthquake:

Ai Shinozaki
Rui Kiriyama
Yoshimi Hamasaki
Momoko Tani
Keiko Kitagawa
Yuuri Morishita
Yui Ichikawa
Yukie Kawamura
Mikie Hara
Yui Koike
Yuko Shimizu
Erina Matsui
Mina Asakura
Risa Yoshiki
Sayaka Isoyama
Yuri Murakami
Azusa Togashi
Rika Adachi

This is a small list of Idols who I've confirmed to be okay by visiting their blogs to see if/what they've posted the past couple days:

Mai Nishida
Natsuki Ikeda
Yoko Kumada
Hatsune Matsushima
Suzanne
Rina Koike
Ryo Shihono
Mao Kaneshiro
Saaya Irie
Erina (Ameno Chiharu?)
Mao Kobayashi
Tomomi Miyashita
Mamoru Asana
Amina Sato
Kokushou Sayuri
Sayaka...