TV-Series
Description
Oshou Yakushi, also referred to as Master Yakushi, is a supporting character in the anime Kuromukuro. His name is sometimes ordered as Yakushi Oshou, and the term oshou in his title identifies him as a Buddhist priest. He is a male character of unstated age with black hair and black eyes.

In terms of background, Oshou serves as the head monk of a temple. He is part of the Shirahane family by birth, being the older brother of Hiromi Shirahane and the uncle of Yukina Shirahane and Koharu Shirahane. Because Hiromi is rarely at home, Oshou took on the practical responsibility of raising Yukina in her sister's place, and he continues to look after both nieces. This position makes him a central caregiving figure within the Shirahane household, even though he is a secondary character in the larger story.

His personality comes across as dependable, calm, and family-oriented. His actions are guided by a sense of duty toward his nieces, and he functions as a stable adult presence in their lives, providing the everyday care that their mother is too busy to give. His motivations are largely domestic rather than tied to the series' larger conflicts; his primary concern is the well-being of his family.

In the story, Oshou appears mostly in family-centered scenes. One notable moment occurs when he joins the Shirahane children and the protagonist Kennosuke Tokisada for dinner, during which Kennosuke, having traveled from the distant past, experiences modern Japanese food for the first time. In scenes like this, Oshou represents the ordinary, welcoming family life that exists in contrast to the alien and military events unfolding elsewhere.

His key relationships are with his sister Hiromi and his nieces Yukina and Koharu. He acts as a second parent to the girls, especially to Yukina, whom he effectively raised. His interactions with Kennosuke are cordial and take place within the context of the Shirahane household.

As a supporting character, Oshou does not undergo significant development over the course of the series, and his personal history beyond his family role is not explored in depth. He also possesses no notable combat or supernatural abilities; his significance lies in his role as the caretaker of the Shirahane family and his connection to the main characters.