And to top it off they gave up their Saturday night in Tokyo at attend the All Blacks test match in the city. There was no end to their self-sacrifice.
Of course the justification is a load of baloney. Why the rugby-loving Mallard couldn't simply come out and say they were going to Japan to watch the rugger, which is course is exactly why they were there, goodness only knows. It's likely a good proportion of the people he announced they were meeting were also at the match, given the limited time they had on the ground, or more correctly at the ground.
There's nothing wrong with a political presence at the match, given just last week the ridiculously named, thanks to Canada's Justin Trudeau, Comprehensive Progressive Trans Pacific Partnership will become a reality before the end of the year. For the first time it gives New Zealand a formal trade deal with Japan, the world's third largest economy.
And of course the Japan's hosting the Rugby World Cup next year that hopefully this country will play a leading role in.
But in the interests of sports diplomacy, who knows, they could be off to London as Parliament goes into recess on Thursday to talk about Brexit and they could stay on for the following weekend in Ireland to talk the trade deal we're negotiating with the European Union. But then they'd have to suffer another two All Black test matches while they're there.
As you set off your fireworks tonight for Guy Fawkes, spare a thought for this jet lagged pair, they'll be needing their sleep.