The blade appears to Kachin, from the most well know Kachin Dao type.
I've seen long handed and also very long bladed swords from the Kachin regions also, I suspect this is a variant but sword like this are typically Arunachal Pradesh as seen here;
http://www.vikingsword.com/vb/showpo...&postcount=154
http://www.vikingsword.com/vb/showpo...5&postcount=18
Gavin