Sento-kun
Sento-kun is the mascot of the 1,300th Anniversary of the Heijo-kyo capital in what is now the city of Nara, which will take place in 2010. His name was chosen from more than 14,000 suggestions, although the design has been controversial: it combines the Buddhist monks and the deer for which the area is famous, but many people have commented that the resulting character is not cute. Sento-kun’s profile is here and his name in Japanese is せんとくん.

Is Sento-kun based on a USA cartoon character? Look at this comparison here:
http://www.letsjapan.markmode.com/index.php/2008/04/25/ugly-mascot-valuable-free-publicity/
Mark
30 Apr 08 at 12:40 pm
[...] product or service and many companies are utilizing mascots to benefit their advertising campaign. In Japan, even mascots come in quirky – and sometimes controversial – [...]
Modern Japanese Mascots at Japan Blog
14 May 08 at 8:14 am