http://news.goo.ne.jp/article/internetcom/trend/internetcom-20111128002.html

http://newsinslowjapanese.com/2014/01/14/japanese-listening-082-introducing-rikaichan-%E3%82%8A%E3%81%8B%E3%81%84%E3%81%A1%E3%82%83%E3%82%93%E3%81%AE%E7%B4%B9%E4%BB%8B/

http://www.asyura2.com/12/senkyo134/msg/674.html