What's the name of Xiao Xin's grandfather?

Kensuke Nohara is a character in the famous Japanese cartoon Crayon Shinchan. He is the husband of Nohara Crane, the father of Nohara Hiroshi and Nohara Hiroshi, and the grandfather of Nohara Shinsuke and Nohara Himawari. He is an interesting old man full of personality. Xiao Xin's head, like his, is shaped like the earth.