Kai-kun (Outousan) retired?
And it looks like his son Kaito-kun now has the role of Otousan.
I read an article from the Shiba side of the forum that mentioned that during the commercials set in Rome Kai was too old/busy to travel so his son Kaito filled in. I believe this article was written in 2012: http://www.japantimes.co.jp/life/2012/04/29/general/otosan-japans-top-dog/#.VDywmhYVHSg
So after consulting Professor Google I found this very short article: http://www.japanator.com/veteran-actor-kai-kun-retires-from-softbank-otousan-role-32458.phtml
Since the articles are from different years I'm not really sure when Kai-kun was actually retired, but I thought it was interesting.
I read an article from the Shiba side of the forum that mentioned that during the commercials set in Rome Kai was too old/busy to travel so his son Kaito filled in. I believe this article was written in 2012: http://www.japantimes.co.jp/life/2012/04/29/general/otosan-japans-top-dog/#.VDywmhYVHSg
So after consulting Professor Google I found this very short article: http://www.japanator.com/veteran-actor-kai-kun-retires-from-softbank-otousan-role-32458.phtml
Since the articles are from different years I'm not really sure when Kai-kun was actually retired, but I thought it was interesting.