He was really seen as someone to rock the boat, and as someone who could really turn around the stodgering top-down society that is Japan. It's probably safe to say that most of the youth of the country were rooting for him, and the new economic growth that he would most likely bring to Japan.
Then he f-ed up, and got caught up in stock fraud. I know that he's still appealing the decision, but the evidence against him was pretty huge, and the backlash was rather dire.
Up until that point, all the proponents of Horie were saying "Look! This young guy is brilliant, making tons of money, and can change the way Japan operates!" When he got arrested, that changed to "Look! This young guy broke the law, was making tons of money, and pretty much guaranteed that the youth of Japan will forever be trapped beneath their senile overlords." (Ok, that last part might just be me)
sorry, it seems I'm still a little peeved about the whole thing.
Yesterday I was talking with the (rather young) CEO of a automotive-electronics startup and he was saying that Japan's industry is slowly dying because of a lack of desire to innovate. He said "In order to succeed in the Japanese market, you can't introduce something new because it'll get shot down. You need to go abroad, do your research, make demos, make it work, then bring it back to Japan and say 'Look what we're doing abroad!' ".
I hope this country does great things (because I don't have anywhere else to go), but I really worry about the future of a country that doesn't value its youth to such a degree that they lose all motivation.