Hi everyone
I am sure this is a chinese sword, and I have seen many similar pictures in China. It is true this sword looks like a japanese sword. Actually, this kind of swords were chinese copies of japanese katana, which were only used by a special troop who were fighting against japanese pirates and warriors in south China.
Pay more attention to handle of this sword, you guys can tell the difference between japanese katana and japanese copies.
http://www.zhengzong.cn/html/15/t-715.html