Yahoo
Yahoo!がTumblrを1100億円超で買収 - GIGAZINE
http://www.nikkei.co.jp/news/kaigai/media/djCFH4550.html
http://internet.watch.impress.co.jp/cda/news/2006/03/22/11328.html
http://www.itmedia.co.jp/news/articles/0509/07/news031.html
Yahoo!がTumblrを1100億円超で買収 - GIGAZINE
http://www.nikkei.co.jp/news/kaigai/media/djCFH4550.html
http://internet.watch.impress.co.jp/cda/news/2006/03/22/11328.html
http://www.itmedia.co.jp/news/articles/0509/07/news031.html