Kurousa (Brown Bunny) and Shirousa (White Bunny) are a pair of rabbit siblings from Sanrio. 

Shirousa (White Bunny) is the older brother, while Kurousa (Brown Bunny) is the younger brother. 

Birthday: May 26th, 2004

They were created in 2004 and featured in the 2007 series Sugarbunnies.