Subtitle: Ancient Mysterious Dragon (古代怪竜 Kodai Kairyū)
- Height: Unknown
- Length: 18 m
- Weight: 15,000 t
- Origin: Northern ruins of the Ancient Civilization
Ultraman Tiga Gaiden: Revival of the Ancient Giant
Seen in the beginning, Mahoroba, the passing-through monster slayer had killed Kurayaminoorochi with a single slash. Later, she took the legendary blade, Yaminaginotsurugi (ヤミナギノツルギ ) which was believed to be inside the monster all along that would be given to anyone whom killed the beast. At the same time, she also discovered the Bronze Spark Lens that was among the rubble.
- Kurayaminoorochi's suit was modified to create the Mizunoeno Dragon suit.
- Kurayaminoorochi's roar was reused from the Toho monster Rodan's roar.
- Kurayaminoorochi's death draws from ancient Japanese Mythology, specifically the tale of Yamata no Orochi and the tale of Grasscutter. Wherein a special blade is retrieved from the corpse of the defeated dragon.