"It's wicked," he told the Herald at the arrival gate. "They're very polite, the Japanese. Humble and gracious."
Unfortunately, things on the field haven't quite gone to plan.
"We've lost 19 games in a row."
Muliaina has also dislocated his finger, which is now in a splint. He'll have it checked, and then return to the fray in a fortnight.
Despite NTT Docomo's poor form, he said he was loving the rugby.
"It's not as intense. But they run a lot. They run everything. When I first started playing, they were tapping the ball five metres out from their own line.
"I'd be like ... 'Man, what are you doing? Have a breather'."
The Muliainas were heading to Invercargill, Mils' old hometown, to see his family before returning to spend Christmas with Hayley's family in Auckland. They return to Japan on December 29.