Ayu made a odd Team Ayu post a few days back. Saying everyone is born alone and will die alone'. Maybe that's related to Michael. I don't know. People like BoA and Rain made statements maybe because they are in the American music industry as well as the Asians but Ayu should say something to pay respects.
BoA has said that she was influenced by Janet and Michael so it only makes sense for her to comment on his death.