Uta Kijima is the stage name used by Japanese voice actor Takahiro Mizushima specifically for his work in adult video games and adult animated content. Born on June 14, 1976, he began his career in the early 2000s and has since become a prolific talent in the anime and video game industries. While he is widely known by his real name for mainstream roles, the alias Uta Kijima is exclusively associated with his performances in adult-oriented media, a common practice among voice actors in Japan to separate their work for different demographics.

As Takahiro Mizushima, his career encompasses a wide range of prominent anime television series. Some of his most recognized roles include Rolo Lamperouge in Code Geass: Lelouch of the Rebellion R2, Romeo Candorebanto Montague in Romeo x Juliet, and Nagasumi Michishio in My Bride Is a Mermaid. He also lent his voice to Takamatsu in Angel Beats!, Taichi Yaegashi in Kokoro Connect, and Jōjirō Takajō in Charlotte. In the long-running franchise Inazuma Eleven, he voiced the character Hiroto Kiyama. His work in video games is equally extensive, with notable roles such as Gawain and Sherlock Holmes in the Fate series, Haruki Kitahara in White Album 2, and Hubert Ozwell in Tales of Graces.

Under the name Uta Kijima, he has voiced characters in a number of adult game and anime adaptations. The roles you've listed are all examples of this facet of his career. For instance, he is credited as Uta Kijima for the role of Tomoomi Hasui in the adult game and OVA adaptation Kuro to Kin no Akanai Kagi. Similarly, he voiced Shinji Ouhashi in the series Dirty Laundry, Akihito Hayasaka in Harukoi Otome, Kūya Hiiragi in Nee, Chanto Shiyō yo!, Kyousuke Midou in Dyogrammaton, and Makoto Yuki in Dirty Thoughts.

Throughout his career, Mizushima has demonstrated a strong commitment to his craft. He is a former member of the Japan Ground Self-Defense Force before transitioning to voice acting. After being affiliated with agencies like Production Baobab and Axlone, he became a freelance voice actor in March 2022, at which point he also began using the stage name Daichū Mizushima while retaining his original name's kanji. In addition to his voice work, he has pursued a music career under the name TAKA, releasing his first mini-album, Reflection, in 2014.