There is a very good product called 'The Ferminator".  It is a deshedding tool for dogs with long hair.

It allows the tool to push through the topcpoat to easily and gently remove the undercoat and loose hair without cutting or damaging the dog's delicate skin.  You will be amazed at the hair it takes off. 

http://www.furminator.com/grooming-solutions/dogs    You can easily 'google' The Fermintor and check all the options out there.   

You should contact an official Honda service centre and they maybe able to assist you.