大山祇

Originally a compound of 大 (ō, “great”) +‎ 山 (yama, “mountain”) +‎ つ (tsu, Old Japanese possessive particle) +‎ 神 (mi, “god, spirit”).^[1][2]

• IPA^(key): [o̞ːja̠ma̠t͡sɨmʲi]

大山祇(おおやまつみ) • (Ōyamatsumi) ^{←おほやまつみ (Ofoyamatumi)?}

1. (mythology, Shinto, Japanese mythology) the kami of the mountains, brother of Amaterasu, Tsukuyomi, and Susanoo

Often followed by an epithet, such as の命 (no mikoto, “august, the venerable”) or の神 (no kami, “the god”).^[1][2]

This spelling appears to be the most common.

• 大山積命(おおやまつみのみこと) (Ōyamatsumi no Mikoto)
• 大山積神(おおやまつみのかみ) (Ōyamatsumi no Kami)