The Kanji in the Japanese name of Naga Daja, 陀 (On: da, ta), is a word used for Sanskrit transliteration, which also means winding or rough terrain itself. "Naga" is derived from Nāga, a class of entity in the form of great snake found in Hinduism and Buddhism, and the Japanese for long, 長い(nagai). "Daja" is derived from the Japanese for large snake, 大蛇 (daija).
Naga Daja was once named 'Long Snake' (長蛇,Chōda?) tentatively.