The earthquake, which sparked a 23-foot tsunami, has already killed hundreds of people with hundreds more missing.
Throughout the day, artists have been flooding Twitter and expressing their thoughts and prayers for the victims. "I'm sending my thoughts and prayers and love to those in Japan who are hurting," tweeted Taylor Swift, while Katy Perry added, "My prayers go out to anyone that is being effected by the disaster in Japan ... "
Here are some of the other artists who expressed their concern in the wake of the disaster today:
"Japan is one of my favorite places on Earth. It's an incredible culture with amazing people. My prayers go out to them. We all need to help." -- Justin Bieber
"2new is in japan too..."wow"...I'm really worried...I can't sleep..." -- will.i.am
"My thoughts & prayers go out to the people in Japan dealing w/the (with the) earthquake, tsunamis & aftershocks. I hope the worst is over." -- Slash
" Wow, I don't even know what to say, Japan. I was just there and you were all so wonderful to me. I am sending all my love, prayers and support." --- Selena Gomez
"#prayinforjapan so sad." -- Joe Jonas
" Oh my god. My heart is breaking for the people affected by the tsunami in Japan right now. #sendingloveacrosstheworld" -- Sara Bareilles
"Please pray for Japan and all affected by this tragic earthquake." --- Gabriel Saporta of Cobra Starship
"praying for the entire world. may we all be safe no matter where we are: lib to consin to new z to iraq to rikers to the D to japan. #peace" -- ?uestlove
"Made it back home safely. Thoughts are still with everyone in Japan... They need our help and support so much right now. Let's do our part." - Hayley Williams of Paramore
So devastating to hear about the huge earthquake & tsunami Japan. My thoughts and prayers are with everyone there. -- Lea Michele
Watch Taylor Swift's 'Back to December' video.