The Japan entertains including anime, tokusatsu, music etc fandom (us) are wondering if the celebs are safe. Fortunately yes, most of them are in good condition. Some media on internet have already compiled list of survived celebrity of Japan. Mostly they got the confirmation from each personal blog. One of my fav who I follow on twitter Tomomi Itano (Kamen Rider W, Queen) has tweeted yesterday, in my local time, that she was not in Japan so she is okay.
Gekidan has posted list of sources where you can find out their status based on three category. If you want to check somebody related to anime, manga or game, you can go to ANN site. For you who want to know everybody related to tokusatsu can visit Nerefir’s blog to check it out. As you’re not fan of those related category (in other word, general artist), try to check Tokyohive.
On Kamen Rider OOO series, Riho Takeda (Hina Izumi), Shu Watanabe (Hino eiji) and Ryosuke Miura (Ankh) have posted that they’re okay. The rest like Hiroaki Iwagana and Asayaka Kimijima, have no post after March 11th. Hina-chan said that they were okay. Also all Kamen Rider OOO stunt casts are safe too.