Tentou Amanohara

Tentou Amanohara (転倒 天の原 lit. that which falls from the sky) are 9 legendary blades forged by the legendary swordsmith's, Masamune and his former apprentice,Muramasa.

Origins
Long ago, as the master swordsmith Masamune sat admiring the stars, he saw 9 shooting stars fall to the ground near an area not to far from his home.

Deciding to investigate, he journeyed for a month, searching to find whatever had fallen from the sky.

What he found were 9 pieces of metal, each of a different kind, each large enough to make one blade each.

Taking these 9 pieces of metal he journeyed home, however, he decided to hide one metal, the most beautiful he had found, in a cave with a spring that was a long the way. Sealing off the cave, he returned to his home.

As a gift to his former pupil, Muramasa, he gave four of the metals to him. Neither had ever since such types of metal that were of such quality.

Each began forging blades from the metals, and the end results were blades of such quality, that neither wished to sell their blades, as these blades never dulled, rusted, or broke.

The 9 Blades
Only 8 blades are in existence for now, as Masamune has not used the last of the metals he had found.

The Blades of Masamune
The First Blade:

The Sixth Blade:

The Seventh Blade:

The Eighth Blade:

The Blades of Muramasa
The Second Blade:

The Fourth Blade:

The Fifth Blade, Juuchi Yosamu (十千夜寒 lit. 10,000 Cold Nights):

The Ninth Blade, Kyuubi (九尾 lit. Nine Tails):

The Third Blade
Under Construction