Ukyo (西 (さい) (おん) () () (きょう) Saionji Ukyō) is a modern-day survivor that was revived by Tsukasa Shishio.


Ukyo is a slim young man with short, blonde hair and blue eyes. He wears an orange cloak, a paper cap, and always carrys a bow and quiver on his back.



He is pacifistic and dislikes needless bloodshed. While he initially joined Tsukasa's Empire of Might as he believed it to be the only way of survival and looked away from Tsukasa's breaking of statues (which is the equivalent of murder) he chose to side with Senku and his kingdom of science under the condition not a single life would be lost. When Senku fulfills his promise, Ukyo fully sides with the Kingdom of Science. He is notably intelligent, managing to quickly deduce that the Lillian talking over the telephone was Gen in disguise and managing to keep Senku's allies alive while they were in the Empire of Might without alerting Tsukasa's suspicions. He also prefers to use his archery to corner his opponents rather than outright murder them though may be willing to murder if forced to.

Abilities and Skills

Super Sensitive Hearing

As a result of his long career as a Sonar Technician inside SDF Navy, Ukyo now has extremely sensitive hearing which allows him to locate a target with pinpoint accuracy by sound alone.

Archery skills

He has tremendous skill with archery, managing to shoot arrows at Magma and Chrome that made it look as if he was trying to pursue them, but purposely shooting so they would hit close to their bodies but miss. In addition, he was skilled enough to shoot an arrow to save Chrome from falling in a waterfall.


Despite Gen managing to perform a perfect imitation of Lilian's voice, he was able to tell it was Gen simply from deducing that Gen wasn't tired from singing for a long period of time like how the real Lilian (or any other singer) would.


Ukyo seems to be fluent in both Japanese and English.  He spoke English to Senku using his buried phone in order to conceal their conversation from the others present.


2/5 D
3/5 C
5/5 A
5/5 A
Ukyo's stats, according to Volume 8


Before he was petrified along with the rest of humanity, Ukyo was a Sonar Technician in the SDF navy. Not much else is known about his past. After depetrification, Ukyo serves as one of Tsukasa's Top Lieutenants as a scout.


Communications Arc

He finds Gen, Magma and Chrome while they are setting up a phone and he corners them with his arrows. He captures Chrome.



  1. Dr. Stone Manga — Vol. 1 Chapter 1, Ukyo is Petrified along with all of Earths Human Population.
  2. Dr. Stone Manga — Vol. 6 Chapter 50, Ukyo first appearance meaning he was revived that year.
  3. Dr. Stone Manga — Chapter 103, Ukyo is Petrified along with majority of the Perseus Crew.
  4. Dr. Stone Manga — Chapter 122, Ukyo is revived along with Yuzuriha and Chrome.
  5. Dr. Stone Manga — Vol. 8 Chapter 67, Gen reveals Ukyo's previous occupation to Senku.

Site Navigation

v  e
Empire of Might
Male Tsukasa ShishioHyogaUkyoYo
Female Homura

v  e
Pre Petrification Humans
Male Byakuya IshigamiGen AsagiriHyogaSenku IshigamiShamil VolkovTaiju OkiTsukasa ShishioUkyoYakov NikitinYoRyusui Nanami
Female Connie LeeDarya NikitinaHomuraLillian WeinbergNikkiYuzuriha OgawaMinamiMirai Shishio
Community content is available under CC-BY-SA unless otherwise noted.