Overheating of "Artificial Intelligence" boom in Japan, while "Data Scientist" is fading out

Currently I'm concerned about incredible overheating of "Artificial Intelligence" boom in Japan - while "Data Scientist" has gone. Google Trends shows Japanese people are getting just less attracted by statistics that is believed to be expertise of Data Scientist, and now they are enthusiastic about Artificial Intelligence. I feel this situation looks much puzzling. So, what's going on in 2015?... yes, I think not a few data science experts in Japan must agree that "Artificial Intelligence" explosively gets popular. Indeed we see a lot of media coverage whose title include "????" (artificial intelligence in Japanese) almost every day.