From nintendo japanese conference.
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http://www.nintendo.co.jp/n10/conference2007fall/e/pop/p_slide19.html
This is the composition of users of Game Boy Advance and Game Boy Advance SP in Japan in May 2005, about 2 and half year ago. Towards the left of the graph, the age is younger, and to the right, it is older. The upper side is male users and on the lower side, females. Nintendo DS was launched in December of the previous year. Nintendogs and Brain Training were launched in April and May of the same year, respectively, but Game Boy Advance was still a significant factor in the market place. As you can see, a great number of younger people were purchasing the product. It was said around this time that the core-users of Nintendo game machines were younger, and it was supported with this kind of data.
At the same time, we researched the same information for DS, and you can see DS users at that time by age and gender. DS's cumulative installed base had not yet reached 3 million, and you can see that the user composition was pretty much the same as that of Game Boy Advance. However, the picture showed significant change as the gaming population started to expand. And now
http://www.nintendo.co.jp/n10/conference2007fall/e/pop/p_slide21.html
It's just like this. To tell you the truth, there is one difference-in the research that you saw before, we gathered people who were 64 years old or younger. Noticing that it was not enough to cover the actual total market, we are now inviting respondents up to the age of 74. Of course, the sheer installed base of DS had already exceeded 18 million by that time, so it is natural to see the total size of the user base expanded. You can also notice that DS has users in any and all of the age demographics. The ratio of female users reached an impressive 53%.