Manichi News reports that cartoonist Mitsuteru Yokoyama, best known as the creator of the animation series GIGANTOR (aka Tetsujin 28-Go), suffered serious burns and died after a fire broke out at his Tokyo home early Thursday.He was 69. Noting that there were numerous cigarette butts in an ashtray in his bedroom, investigators said they suspect that the fire started because the artist failed to extinguish one of his cigarettes.