Live action TV
Description
Professor Asuka is a minor character in the Devilman franchise whose significance comes almost entirely from what he leaves behind. His main anime appearance is in the 1987 original video animation Devilman: Tanjou-hen, where he appears in the story's early events, while in the original manga he is seen only in flashbacks and a photograph.

In terms of background, Professor Asuka was a famous archaeologist and the father of Ryo Asuka, and he was married to an unnamed American woman. His given name is never revealed. His research focused on ancient demons, and he appears to have been a dedicated scholar who pursued hidden history at great personal cost. In the OVA, he is depicted as a well-built man with black hair, a beard, and glasses, and he is shown smoking when under stress, suggesting a man weighed down by the implications of what he had uncovered. The professor's primary motivation was scholarly discovery, and his work ultimately placed both himself and his family in danger after he discovered a significant artifact known as the Demon Mask. The OVA implies that the professor himself was possessed by a demon not long after making this discovery, and the circumstances surrounding his death are tied to that possession; he is understood to have taken his own life in an attempt to protect his son from the demon that had taken control of his body.

Within the story, Professor Asuka acts as a catalyst whose influence is mostly felt after his death. His son Ryo inherits his research, and it is the professor's notes that open Ryo's eyes to the truth about demons and their plan to destroy humanity. This knowledge sets the larger conflict in motion. In the OVA, his possession and death are dramatized as the tragic event that begins the narrative, and his discovery of the Demon Mask is the direct cause of the demonic resurgence depicted in that version of the story.

His most important relationship is with his son, Ryo Asuka. The professor is also connected to Akira Fudo, the main protagonist, who reportedly visited the Asuka household and socialized with both father and son about a month before the professor's death. The professor's wife appears only in a photograph, so she exists in the story purely as part of the family's past.

Because Professor Asuka dies before the main events, he does not develop as an active participant in the narrative. Instead, his character develops through the gradual revelation of his past. His death is initially presented as an unexplained suicide, but later material, particularly the OVA, reframes it as a consequence of demonic possession, giving him a tragic dimension as a man destroyed by the very knowledge he sought to uncover.

Professor Asuka possesses no supernatural abilities. His capabilities are intellectual and professional, consisting of expertise in archaeology and a deep understanding of ancient civilizations. These skills allowed him to locate the Demon Mask and to compile the research notes that later serve as a crucial source of knowledge about demons. His legacy, rather than any physical action, is what ultimately shapes the events of the story.