Oyabiko (大屋毘古神 – Great Roof Lad) dwelt in the area of Woods and is known to have sent Ōkuninushi to Susano-o after saving him from his brothers. He was the sixth of ten Spirits created after Izanami and Izanagi had created the Eightfold Isles and the six subsequent isles, according to the Kojiki. Nothing more is mentioned of him.1
The Nihongi does not give a name to this deity, simply stating:
Izanagi and Izanami then produced the sea, the rivers, and then the mountains, after the Eightfold Isles.2
1. Yasumaro. O, translated by Gustav Heldt. (2014) “Kojiki. An Account of Ancient Matters”. New York: Columbia University Press.
2. Aston. W.G. (1896) “Nihongi Volume 1: Chronicles of Japan from the Earliest Times to AD697”. Tuttle Publishing.
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