It's not all feasting, of course. Mils is there to play rugby and although the Red Hurricanes are performing poorly - they've lost their last 19 games - he's enjoying himself.
"Playing in Japan gives you the ability to do whatever you want, really. I'm playing in the centres, though I'm bigger than most of the props. Honestly, I'm not lying! The boys over there are like, 'Man, you're so big'.
"But while they're small, they never stop running. They're tenacious. And brave - they tackle really low."
Their attitude, he says, can't be faulted. "But it's kinda odd when they start talking about players you've played with - players they idolise.
"They've got the pictures on their phones. They're always watching YouTube. We'll be on the bus and they'll be watching the Tri-Nations on their tablets. Watching Dan's 'greatest hits'."
Mils laughs. Now he's joined by wife Hayley and 4-year-old son, Max, a probable selection in the All Blacks 2031 World Cup squad.
They're off to Invercargill, his old home-town - he still rolls his Rs - to see the Muliaina whanau, then returning to Auckland to see Hayley's family. Then it's back to Japan - and back to rugby.
"Life is good," he says, smiling. "Different. But good."