https://twitter.com/yaruki_kun/statuses/863566108896313345

https://marketing-rc.com/report/report-monthly-20170510.html#free-download-h3

https://twitter.com/noshimoda/status/862155470034812932

https://www.advertimes.com/20170515/article250119/

http://www.itmedia.co.jp/news/articles/1705/15/news147.html

http://www.atmarkit.co.jp/ait/articles/1705/15/news018.html

http://vrinside.jp/news/vive-2-will-come-with-really-innovation/

http://lastline.hatenablog.com/entry/2017/05/15/095401