This is a XML Sitemap which is supposed to be processed by search engines which follow the XML Sitemap standard like Ask.com, Bing, Google and Yahoo.
It was generated using the ワードプレス content management system and the XML Sitemap Generator Plugin 〜によって Arne Brachhold.
You can find more information about XML sitemaps on sitemaps.org and Google's list of sitemap programs.