The Land of Iron (鉄の国, Tetsu no Kuni) is an icy, snow-covered country located among three mountains called the Three Wolves (三狼, Sanrō). Unlike other countries of the world whose militaries use shinobi, the Land of Iron's military is made up of samurai. Due to the differing ideologies between shinobi and samurai – as well as the fact that the Land of Iron's samurai are quite formidable – there is an agreement among shinobi not to interfere with the Land of Iron.
Because the Land of Iron has had little involvement with the shinobi world, shinobi have frequently used the country as a neutral meeting place for diplomatic discussions: the country has hosted at least one Kage Summit, the Continental Summit, and the Shinobi Union is headquartered there.
As an effort to bridge the gap between samurai and shinobi, the Seventh Hokage and Mifune committed to a student exchange programme, where Mifune's last disciple Tsubaki Kurogane was sent to Konohagakure as a member of Team 15.
- Naruto chapter 456, pages 15-16
- Naruto chapter 468, page 10
- Naruto chapter 457, pages 16-17
- Shikamaru Shinden: A Cloud Dancing in Forlorn Falling Petals
- Shikamaru Hiden: A Cloud Drifting in Silent Darkness
- Boruto episode 137