Apple and The Dentsu Group partnered to expand Apple's iAd mobile advertising network to Japan in early 2011. Dentsu will be responsible for the selling and creative execution of iAds in Japan, and Apple will host, target and deliver the iAds to its iPhone and iPod touch users.
iAd was launched in the US in July and has emerged as a powerful new way for leading brands to reach the tens of millions of iPhone and iPod touch users, while providing a significant new revenue stream for developers.
iAd, which's built into iOS 4, lets users stay within their current app while engaging with an ad, even while watching a video, playing a game or using in-ad purchase to download an app or buy iTunes content.
Developers who join iAd Network can easily incorporate a variety of advertising formats into their apps. Developers will receive an industry-standard 60% of the iAd Network revenue, which's paid via iTunes Connect.
More Info: join the iAd Network