Soubi Yamamoto is a Japanese anime director, writer, and manga artist born in Hiroshima Prefecture in 1990. Her interest in animation was sparked during middle school after watching Makoto Shinkai`s Voices of a Distant Star, which inspired her to pursue a career as a creator. She began producing independent animation while still a student and made her debut in 2009 with Sekaikei Sekai Ron.

Yamamoto gained significant recognition as the original creator, writer, and director of the Kono Danshi or This Boy series of original video animations. She made her scriptwriting and directorial debut in 2011 with the twenty-eight-minute Kono Danshi, Uchū-jin to Tatakaemasu, also known as This Boy Can Fight Aliens. The following year, she released the second installment, Kono Danshi, Ningyō Hiroimashita, or This Boy Caught a Merman. In 2014, she continued the series with Kono Danshi, Sekika ni Nayandemasu, which is titled This Boy Suffers from Crystallization. These works were produced in collaboration with CoMix Wave Films, the company known for releasing the films of Makoto Shinkai.

Beyond her original video animation projects, Yamamoto expanded into television series directing. In 2013, she directed her first television anime series, Meganebu. She later returned to the Kono Danshi franchise for a four-episode television anime, Kono Danshi, Mahō ga Oshigoto Desu, which aired in 2016.

Her artistic identity is characterized by a focus on intimate character-driven stories featuring a small number of protagonists. In an interview, she has cited the influence of boys-love titles for demonstrating that compelling narratives can be built around a relationship between two people. She has also discussed the impact of the sekai-kei genre, a style of story centered on a relationship between two individuals that determines the fate of the world. Yamamoto has noted that while she finds sekai-kei narratives beautiful, she intentionally aims for her own stories to end on a more positive note, incorporating the kindness of a broader world. Her production style is notably hands-on; for her early works, she handled a significant portion of the animation, direction, and writing herself, using software such as Adobe Photoshop, After Effects, and RETAS. Her visual style is noted for its vibrant colors and varied textures.