熱田神宮
is allegedly kept at Atsuta Shrine but is not available for public display. During the Edo period, while performing various repairs and upkeep at Atsuta Shrine, including replacement of the outer wooden box housing the sword, the Shinto priest Matsuoka Masanao claimed to have been one of several priests to have seen the sword. Per his account, "a stone box was inside a wooden box of length , with red clay stuffed into the gap between them. Inside the stone box was a hollowed log of a camphor tree, acting as another box, with an interior lined with gold. Above that was placed a sword. Red clay was also stuffed between the stone box and the camphor tree box. The sword was about long. Its blade resembled a calamus leaf. The middle of the sword had a thickness from the grip about with an appearance like a fish spine. The sword was fashioned in a white metallic color, and well maintained." After witnessing the sword, the grand priest was banished and the other priests, except for Matsuoka, died from strange diseases. The above account therefore comes from the only survivor, Matsuoka.