This video, titled "Five Legendary Japanese Swords! an Introduction to Okanehira and Other Swords Designated National Treasures [Japanese Sword Series 2]" (現存する伝説の日本刀５選！大包平など国宝に指定される刀まとめ【日本刀シリーズ２】), was released by "Ranking Dynamite" (ランキング・ダイナマイト).

In the history of Japan, there have been many Japanese swords considered masterpieces, but there are very few Japanese swords that have survived through the ages.
In this video, you can see some of the most famous Japanese swords that have been carefully preserved to this day.
Okadagiri, owned by Oda Nobunaga, Masamune, made by a master craftsman, Sosan Samoji, which is said to have been a favorite of Imagawa Yoshimoto, and Raikiri, which is said to have been used to cut lightning.
The most valuable sword is the Okanehira, which is said to have been made with the most advanced technology of the time.
Check out the video to see some of the beautiful Japanese swords that have been designated national treasures.