National police agency, security bureau section chief. As a representative of the police. Seigen gets involved in various cases. (Source: UN-GO official site)

He pursues his job as the "Last Great Detective". Others call him the "Defeated Detective". What's certain is that he's Shinjurou Yuuki, a young man with a passion for mysteries and a talent for solving them that has made him the target of dark forces now stirring within the sinister underworld of a near future Tokyo. That could prove lethal, given that not even the other "good guys", including the police, are exactly on Shinjuro's side. Fortunately Yuuki's not completely on his own, and with the aid of his uniquely talented associate Inga, he's ready to cut a swath through the veils of secrecy that have been laid before him. 
 
Get ready for mind against matter and a lot of cloak and dagger as the ultimate battle of clue and deduction begins in UN-GO! 
(Source: Sentai Filmworks)

[Agency Profile](https://junction99.com/?page_id=1134)

He joined a theater troupe when he was 4 years old, and two years later made his acting debut in the historical drama Korczak. He remained with the theater troupe until March 2006, when he moved to Junction.

Made his voice acting debut in 1996 on [Taiho Shichauzo](https://anilist.co/anime/1577/). He auditioned and got the role of [Haku](https://anilist.co/character/385/) in the 2001 film [Spirited Away](https://anilist.co/anime/199/). The same year, he voiced the eponymous main character in [PaRappa The Rapper](https://anilist.co/anime/3736/), and the following year he started voicing Sora in the Kingdom Hearts video game series, a character who he still voices to this day.

He released his debut mini-album Soleil on June 26, 2009 and his first single album, Faith, on November 25, 2009. Since May 2010, he and [Hiroshi Kamiya](https://anilist.co/staff/95118/) formed a music duo called [KAmiYU](https://anilist.co/staff/116031/). Their first mini-album "link-up" was released on August 3, 2011.

Announced his marriage with an unspecified woman on September 3, 2021.

__Non-anime voice roles:__
- Sora - *Kingdom Hearts* series (VG)
- Cyno - *Genshin Impact* (VG) 

This prequel takes place at the same time as the first episode of the TV series. As the story begins to unfold, more mysteries that were unanswered in the first eleven episodes come to light, and we learn the full story of the duo’s story. (Source: HIDIVE)

Seigen Hayami