Sachi Kokuryu is a Japanese voice actor and stage actress born on July 9, 1984, in Saitama Prefecture. She is affiliated with the Himawari Theatre Group and began her voice acting career in 2004.

Kokuryu is known for her versatility, frequently portraying young boy characters with energetic and spirited vocal performances. One of her earliest leading roles came in 2005 as the protagonist Weed in the anime series Ginga Densetsu Weed. She gained further recognition for her performance as Fran in the popular series Katekyo Hitman Reborn.

Her extensive anime filmography includes a number of notable and recurring roles. She voices Arthur Pendragon across multiple installments of The Seven Deadly Sins franchise, including The Seven Deadly Sins: Revival of The Commandments, The Seven Deadly Sins: Imperial Wrath of The Gods, The Seven Deadly Sins: Cursed By Light, and The Seven Deadly Sins: Four Knights of the Apocalypse. In the long-running comedy series Mr. Osomatsu, she provides the voice for the character Chibita.

Kokuryu has also played significant roles in the Gundam franchise, appearing as Reiji in Gundam Build Fighters and as Azee Gurumin in Mobile Suit Gundam: Iron-Blooded Orphans. Additional prominent roles include Shou Suzuki in Mob Psycho 100 II, Zero Shinagawa in Doreiku The Animation, Duelle in Legend of Mana: The Teardrop Crystal, Kun in The Fire Hunter, Shinnosuke Tenmaya in MARS RED, Taiga Yagura in the Tomica Hyper Rescue Drive Head franchise, and Ilse Langnar in the Attack on Titan OVA Ilse's Notebook. Beyond anime, she has contributed her voice to video games such as Granblue Fantasy, The Seven Deadly Sins: Grand Cross, and the Fuga: Melodies of Steel series. She was also a member of the singing unit Tenka Tori Tai, formed for the series Battle Girls: Time Paradox. In addition to voice work, Kokuryu remains active in stage performance, having appeared in numerous theatrical productions.