It has been announced that the stars of the upcoming Gantz movies, which includes Ninomiya Kazunari, will be attending premiere events for both the Japanese and U.S. even though they are on the same day.
They will be attending a stage greeting event on the morning of January 20th in Tokyo then board a plane afterward to attend a stage greeting in Hollywood in the evening of the same day.
Tokyo Graph article. (English)
This is definitely something that can be done because of the international date line being in the Pacific ocean, though I can imagine that this will be tiring for the actors. That said I hope they're ready to deal with the fangirls that will be showing up now to see Ninomiya.