The legend said that this statue was discovered in the sea of Tango region. The carving technique of the early Heian period can be seen on the stern face with connected eyebrows, as well as the thick and broad body structure. The scarf-like cloth (jōhaku) was draped widely which is rare to see, it leads a theory that this statue belongs to the Tendai sect.
 
Shigeki Iwata 
Masterworks from the Nara Buddhist Sculpture Hall at the Nara National Museum. Nara National Museum, 2010, p.141, no.133. 

 This is a statue of Nyoirin-kannon (Cintāmaṇicakra) with six arms. The head and the body were carved from a single piece of kaya wood (Japanese nutmeg). The left leg was made of a single piece of wood that includes the tree's center core, cut transversely. The right leg, which is drawn up, was made of a wooden piece which was cut vertically from a tree. Triangular wooden pieces were attached to the body and in turn the thighs were attached to those triangular pieces. Small wooden pieces were used for making details such as toes. Bronze ornaments still remain on the bottom part of the crown. Pupils of the eyes were made of wood and inserted: the kind of the wood for the pupils were different from the wood for the body. There is a trace of lacquer foil covering the crown. The body was originally colored, but the color has come off. The posture of the statue with its upright head facing the front indicates the classic style of this statue. The characteristic aspect of the modeling is the body's stoutness which is in contrast to the relatively slender arms and legs. The descriptions of continuing eye-brows, outlines of ears and breast are also characteristic. The date of production is thought to have been between the end of the 9th and the 10th centuries. This is the second best masterpiece sculpture of Nyoirin-kannon next to the one in Kanshin-ji temple in Osaka. 
Masterpieces of Nara National Museum. Nara National Museum, 1993, p.18, no.7.