What is the Japanese term for "ghost soldiers" in their culture..

In Japanese culture, "ghost soldiers" are often referred to as "yūrei" (幽霊) or "bōrei" (亡霊). These terms generally refer to spirits or ghosts of deceased individuals, including soldiers who may have died in battle or under tragic circumstances. The concept of yūrei and bōrei is deeply rooted in Japanese folklore and has been depicted in various forms of literature, art, and media throughout history.