Andy Murray has added the Japan Open men's double title to his individual triumph earlier in the day.
"It just obviously makes it a bit extra special playing with your brother," said Andy Murray.
"It's the second time we've won and he played great.
"After the tough singles match earlier where there were a lot of long points, I'm glad he managed to help me out by playing really well because it would have been tough otherwise."
Andy Murray has become the first player to do the double in Tokyo since Stefan Edberg in 1991.