I remember back in a youtube video Michio mentioned that he like to see evidence for life after death but there is none. He calls it religious immortality. He says as a scientist there is a problem to the idea of immortality and religious immortality and that is there is no proof that it exists remarkable claims require remarkable proof but maybe you don't need proof but i do.
He is also is a strong supporter of superstring theory.
If only Michio Kaku could look outside the materialist mainstream science opinion but he can't if he did and looked into psychical research and parapsychology and researched it with an open mind he more than likely would come to the conclusion that the view of life after death is more probable than not.
Here's the youtube video here