On a more personal note, if the urge takes him to finish off that striking artwork on his right shoulder and upper arm, beware ... I hear downtown Tokyo prices for tattoo makeovers are through the roof this year.
We all know Tokyo is a crowded city and full of weird and wonderful sights and sounds, so SBW will have to learn to trust his instincts.
If he sees someone in nappies and bare-chested in the street, it probably isn't Richard Loe on his way to a sumo wrestling class.
He may notice in passing, a large palace in the middle of the city. In fact I understand this has been earmarked as an upmarket housing estate for SBW's increasing entourage.
It won't have escaped those who saw his final press conference in New Zealand that there are already too many Chiefs and not enough Indians in Team SBW. Perhaps they're there so no voluntary handshake is ever missed.
All that remains is to wish Sonny Bill Williams well in his new direction. He's still got lessons to learn and goals to achieve, but he can become one of New Zealand's greatest footballers (rugby or league).
I can't buy this accusation of disloyalty from SBW's detractors - he walked out of the Canterbury Bulldogs in the NRL because he wasn't being paid what some lesser performers were. Good on him.
And his reviled management can't be accused of anything more than doing their best for their clients. That's the kind of loyalty I'd like to have from my advisers.