[quote=@LeeRoy]
[@MelonHead] 
Shin has an incredibly personal distaste for the Katana weapon, mostly because he was alive during World War 2, and has an incredibly deep seated hatred for the Japanese for what they did to the Chinese. The Katana being the figurehead weapon of Japanese culture, he refuses to use it, out of respect for his homeland. However, that does not stop him from using other Japanese-make tools such as the Kusarigama.

[/quote]

Makes sense, the Rape of Nanking was pretty brutal, and one of the key events was the 'Kill 100 people with a sword' competition.