Talk:Ookanehira/@comment-30945738-20170107063318/@comment-30800884-20170107130929

one of the 5 tenka goken - sort of the "top 5 swords in the history of japan" etc (note this does not include Ookanehira 大包平 or Kogarasumaru 小烏丸)

you can find a scan of the swords here

http://www.samurai-jpn.com/5famousswords_en.html

unfortunately only juzu and douji are large format, others are super compressed. I'm sure there are other websites with english info and perhaps better photos.