Darman
No, Darman is Pashto with Persian roots, though it is used by Muslims and carries Islamic meanings related to divine healing.
Yes, it adapts naturally to Japanese phonology as ダルマン (Daruman) without requiring sound modifications.
It appears in classical Pashto poetry and medicinal texts, symbolizing the healer's role in society.
While the name itself is not in Hadith, the concept of healing (shifa) is highly praised in Islamic tradition.
Traditionally masculine, but modern usage in diverse Muslim communities includes unisex applications.