"It's not a matter of whether we like it or not that's what we're doing so we might as well get excited about it," he said.
"The tournament wants to get away with a bang and that'll probably be the big game in the first round. It was either going to be us or France and England so it looks like we drew the marble."
If current form continues, the winner of that clash will set themselves up for a quarter-final against Scotland or Japan in Tokyo, while the loser faces a possible meeting with Ireland, also in Tokyo.
Japanese officials are anxious to make this tournament, which World Rugby president Bill Beaumont described as "groundbreaking", a resounding success. And New Zealand's popularity among Japanese fans has been reflected in the team's venues.
The spacing of New Zealand's games is not even.
Eleven days after the Springboks clash, they will play the repechage tournament winner at Oita Stadium, a 40,000-seat venue.
Just four days after that, Hansen's team will face a yet-to-be-decided African qualifier at the 50,000-seat Tokyo Stadium.
The African qualifier will be the team that tops next year's Africa Gold Cup, a round-robin competition featuring Kenya, Uganda, Morocco, Tunisia, Zimbabwe and favourites Namibia.
And six days after New Zealand's third match, they will round out pool play against Six Nations strugglers Italy at the 45,000 capacity City of Toyota Stadium.
Other eagerly anticipated pool matches included Six Nations rivals England and France, who clash at Yokohama on October 12. Also in Pool C are World Cup specialists Argentina, who meet France and England at Tokyo.
The fast-improving Wallabies are scheduled to meet Warren Gatland's Wales in a Pool D cracker at Tokyo on September 29.
Twelve venues from Sapporo in the north to Kumamoto in the south will play host to the ninth Rugby World Cup, the first to be staged outside a top-tier rugby nation.
The capacity ranges from Yokohama's 72,000-seat stadium to the 16,000-seat Kamaishi Recovery Memorial Stadium in the north of the country.
This will be a World Cup that doesn't cross borders or time zones. Travel times will be comfortable in this compact, island country with its modern, efficient transport infrastructure.
The final will be played in exactly two years from now at Yokohama's International Stadium, which hosted the 2002 Fifa World Cup final.
The quarter-finals will be shared between Oita and Tokyo, while both semifinals will be at Yokohama. The bronze final will be played at Tokyo, as will the September 20 tournament opener between hosts Japan and a European qualifier.
Tickets will go on sale from January 19 next year and will be priced between ¥2019 and ¥100,000 ($25-$1269), while there will also be children's tickets available for ¥1000.
All Blacks' pool matches:
September 21: 6.45pm: South Africa (Yokohama)
October 2: 7.15pm: Repechage Winner (Oita)
October 6: 1.45pm: Africa 1 (Tokyo)
October 12: 1.45pm: Italy (Aichi)
*All Japanese times