Raijin

is a god of thunder and lightning in Japanese mythology. His name is derived from the Japanese words rai (雷, meaning thunder) and shin (神, god). He is typically depicted as a demon beating drums to create thunder.Raijin is sometimes credited with eating the bellybuttons or abdomen of children, and in the event of thunder, parents traditionally tell their children to hide their navels so that they are not taken away. Raijin's companion is the demon Raiju.Raijin is also known by the following names:Kaminari-sama: kaminari (雷, thunder) and -sama (様, a Japanese honorific)Raiden-sama: rai (雷, thunder), den (電, lightning), and -samaNarukami: naru (鳴, thundering/rolling) and kami (神, god)
See more at Wikipedia.org...

[Japanese] One of the Japanese gods of thunder. Raijin is depicted as a muscled man carrying a series of drums, which he uses to make the rumbling sound of thunder. According to some legend, he and Fujin were originally demons who opposed the gods. The great Buddha ordered his army to capture them. After a severe battle between the two demons and 33 gods, the demons were captured and converted.