New Zealand have won 84 and lost 15 of their games during Henry's reign, and they remain clear favourites to lift the World Cup for the first time since 1987.
"It's a privilege, really, to be involved in the most successful sporting team in the history of sport over 110 years," Henry said. "It is special, and I am proud to be a part of that.
"And to do that 100 times is also special - but probably a sign of madness as well.
"I think it is a reflection on what the management team and the leaders in the team have done over these last eight years to keep me in a job."
Henry has recalled full-back Mils Muliaina for his 99th cap and switched Israel Dagg to the wing, although Henry denied it was a sentimental selection as Muliaina closes in on a century of Test appearances.
"No, not at all," he added. "Mils is part of this group. He has been an outstanding player and he needs to play.
"Israel has been playing very well and he got player of the day last week (against France), but Mils has played 98 games for the All Blacks and has been an outstanding All Black for a long time.
"So it's a major challenge for both of them and that is good for the team."
Elsewhere, number Kieran Read returns from injury to make his first tournament start, with Zac Guildford on the wing, as the All Blacks target a fourth successive bonus point victory ahead of a probable quarter-final against Argentina next weekend.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
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Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
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The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.