Dr. Ni Jianyi

Jeep 206

Jeep 207

Kanji 【你 健一】
Alias Ken'yuu
Ukoku Sanzo
Age 37
Birthday August 24
Race Human
Gender Male
Height 177 cm (5'8")
Hair Jet-black
Eye Color Black
Blood Type O
Status Alive
Manga Debut Sai. Vol 3, ch. 17
Anime Debut Saiyuki Ep. 08
Seiyuu Houchuu Ootsuka (大塚 芳忠)
English Tommy Drake (in Saiyuki)
Kirk Thornton (in Sai R. & Sai R Gun.)
Stage Karahashi Mituru
Skills expert martial artist
Buddhist techniques (without chanting)
Doctorates in Bio-engineering
Weapons Muten Scripture

Dr. Ni Jianyi (你 健一) is one of the villain of anime/manga, Saiyuki, who is instrumental in helping Gyokumen Koushu to revive Gyumaoh. He is an evil genius and considered one of the main enemies of Genjo Sanzo and the Sanzo party. He is also the Sanzo who holds the Muten Sutra---Ukoku Sanzo


Ni's personality is difficult to nail down, as well as his motives, but to those who have met him, it boils down to one thing: insanity. As Ukoku or Dr. Ni, he presents himself as being calm, intelligent, and a bit of a philosopher and at the same time walks around in bunny slippers and talks to stuffed toys. Most would simply regard him as the usual crackpot, but Ni is very much in his proper senses. The scientist has a 'hobby' of playing with other people like toys or pieces in a chess game, as if they were guinea pigs of life. This is his main motive in life, since he doesn't desire material possessions.

Manipulating calls for high intelligence, and he has just that. Ni has a full knowledge of nearly all forms of learning, including human science, Buddhism, and even martial arts. A bit too much, when you think about it, but Ni never reveals to anyone ALL that he is capable of and hides his malice with a smile.

In Saiyuki Burial, it shows him explaining to Koumyou Sanzo that he doesn't feel alive unless he's in a life-or-death situation. Whether this plays any role in his decision to help Gyokumen Koushu revive Gyumaoh is unknown.


Very knowledgeable and intelligent. Always calm, sly and well versed in Martial arts. Unparalleled in concentration (can use buddhist techniques without chanting, but that does not include invoking the Muten Sutra).


Cold, detached and ruthless. Treats everything like a game. Has no permanent alliance. Hates losing or feeling humiliated (enough so that he drops his poker face and loses his temper, and may even physically lash out). Mortal.


When it comes to outer appearances, Ni doesn't look evil at all with his scruffy hair cut, thin stubble of a beard, slightly wrinkled lab coat, pink bunny slippers, and ever-present stuffed bunny.The malicious smile, though, destroys the facade for those who would look more closely.

Jeep 021

"Dr. Ni"

If anyone would be bothered to look at details, Ni has jet-black hair in a short haircut, with a few bangs. As Ukoku Sanzo, he lets his hair as it is, with the back slightly ruffled. He wears the standard Sanzo robes, he is the only Sanzo who doesn't have a chakra on his forehead. As the demented doctor, Ni's hair is slicked back, although a few stubborn strands of his bangs stay where they are. Beneath the scientist's labcoat is a shirt and tie, as well as dark slacks. He also seems to fit the appearance of a middle-aged, overworked doctor: lean but not very fit, without the potbelly. Always, a pair of square glasses sits in front of black eyes, and a cigarette is usually between his lips. He has a nondescript face, easy to forget if you miss the glint of malice in his eyes.

As Ukoku Sanzo


Koumyou Sanzo & Dr. Ni gall11

Ken'yuu and Koumyou

Koumyou Sanzo - For Ukoku, Koumyou is the moon and while he is the night. Koumyou met a student name Ken'yuu when he visited Goudai Sanzo in his Zen'ou Temple. Koumyou became interested on him. Later on, he had a chance to talk to Ken'yuu while he was sweeping that he reminds him of his student back to Kinzan temple and might grow up like him. Telling him that he resembles Kouryuu in some respect. Ken'yuu tells Koumyou that he wants to be a Sanzo. After some little chat, Koumyou invited him to eat potatoes. Ken'yuu teases Koumyou that regular old man doesn't wear ponytail and for him Koumyou is an odd Sanzo Priest. He can't even tell if Koumyou is brilliant or retarded. Another question for Koumyou, Ken'yuu asked him if he could kill him if he asked to. Koumyou is the one who christened him as "Ukoku Sanzo" and traveled with him around the world. When Koumyou was staying in Kinzan Temple, Ukoku visited him and even made a bet.

Kami-sama - He was picked up by Ukoku while selling his body to live and called him Kami-sama. He was thoroughly spoiled by Ukoku. He was raised as a selfish prince and even adore Ukoku with something close to obsession, but Ukoku sees him nothing as a toy. He even took him to Kinzan Temple where Kami-sama met Kouryuu for the first time. As he grew up, Ukoku gave him an odd castle and everything inside. In Kami-sama's final moment, Ukoku didn't helped Kami-sama, but instead he just answered his question if "God" really exist. Ukoku tells him that he thinks that God don't really exist. He left Kami-sama in the crumbling castle.

Gyokumen Koushu - Dr. Ni acts like the right-hand man of Gyokumen Koushu. It is also implied they act as lovers, a thing that seems to disgust Professor Hwang. In the manga, it was shown that the two was obviously in some sort of sexual relationship, while the anime has just hinted at it.


Jeep 204

Dr. Ni being creepy and playing with Mr. Bunny.

Mr. Bunny (aka Bun-bun or Usa-chan)- Container for the Muten Sutra, thus constantly ripped apart and repaired again whenever needed.

Muten Sutra

Muten Sutra ("Death" and "Nothingness") - The sutra entrusted to Ukoku Sanzo. When invoked, it allows Ukoku to call forth the essences of the dead, as long as they haven't reincarnated yet. The souls may take the form of any of their former lives (sometimes shifting from one to another), but they are not solid, nor are they allowed to stay for long. They're pretty harmless unless, it's a particularly annoying soul who likes to frighten people. The Sutra can also banish/free souls trapped on earth, and make any being around it temporarily mortal (it can't make beings immortal).

Fighting Style Overview

Ni doesn't fight. He strikes deal, escapes, or gets someone else to do the dirty work. He wouldn't put himself into a fight unnecessarily in the first place. However, that doesn't mean he can't fight. Ni retains most of his Buddhist powers, and he is able to use them without chanting a mantra. When he decides to show what he can really do, one of his attacks creates multiple gashes on a person without actually touching him. This has to be within range (2 m). Ni is only playing when he resorts to martial arts. Not to disregard the Muten Sutra, but Ni doesn't invoke it unless he wants to get rid of a god, and for the meantime that isn't necessary.


as seen in the manga and anime.

The Mandrake Plant (Jingko tree) - It was created and personally given to a temple by Dr. Ni. The priests unknowingly accepted the gift from Dr. Ni, planting it in front of their temple, where it grew to full size within a week. Its branches were able to scratch any person who climbed on it, effectively stealing the DNA of the person. With the DNA, the fruit once plucked can grow into that person's clone, though it withers unless cut from the tree with a special tool. It was also able to produce seeds, that once eaten, were able to grow from inside the stomach, sprouting out vines and taking control of the victim, forcing them to go to the roots of the Mandrake to become human fertilizer. It was banished by means of Sanzo's gun and Goku's nyoi-bou.

Queen Bee - Ni devoted his free time to inventing this tiny mechanical bee, able to inject bee DNA to the neck of a human who has suffered anger, hatred and disrespect in silence, thus transforming him or her into a bee youkai. The victim will be consumed by rage and will attack anybody she sees. Sha Gojyo was able to see the source and destroy the bee.

Demon bracelet invented by Ni Jienyi. Notice the rabbit design.

Demon bracelet - Given to Kougaiji as a gift. It is able to double demon muscle strength with a price of pain. The research on this bracelet is still at preliminary stage, and excessive use will cause severe damage to the body. Kougaiji was aware of this, but did not realize the full extent of the consequences until Goku destroyed it. In an example of Ni's twisted sense of humor, the bracelet is stamped with a design of rabbits.

Zakuro's gun

Red paint gun

Red paint gun - The invention used by Zakuro, a youkai specializing in hypnotism. It looks like a colourful toy gun, but when used, splashes pink liquid that causes disintegration, even to rocks. It was used on Gato (Saiyuki Reload Gunlock), but he managed to survive and be healed by Hazel Grosse.

Incubation chamber - One of these is used to contain Gyumaoh's body while Gyokumen's forces retrieve the essential Seiten and Maten Sutras. Another chamber is used to place an injured Kougaiji to heal and brainwash him, while another was used for Lirin, who was to be used for some sort of sacrifice. Other youkai were also placed in these chambers, for use in Dr. Ni's research and experiments.


Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.