Kenshi Takahashi/Current Timeline

Mortal Kombat (2011)
In the story mode of Mortal Kombat (2011), Kenshi appears only in the opening sequence, in which he can be seen lying dead on the steps of the Pyramid of Argus. Later, during the Outworld tournament in the alternate timeline, Kenshi's name is announced by Shang Tsung as a fighter in an upcoming (offscreen) battle between himself and Reiko.

Mortal Kombat X Comic
To be added...

Biographies

 * Mortal Kombat (2011): "For years the swordsman Kenshi traveled the world in search of worthy opponents. When a mysterious elderly man named Song offered to show him the location of Sento, an ancient sword worthy of his abilities, Kenshi succumbed to pride. He followed Song to a tomb wherein lay the Well of Souls. When Kenshi retrieved the sword, spirits of ancient warriors spewed forth, blinding him. Song then revealed himself to be Shang Tsung. He consumed the souls, leaving Kenshi in the dark labyrinth to die. But Sento called to Kenshi. It led him out of the tomb and revealed his lost heritage as a descendant of the warriors who had been buried there. Kenshi vowed to slay Shang Tsung and free the souls of his ancestors."

Endings

 * Mortal Kombat (2011): (Semi-Canonical) "Guided by Sento, his ancestral sword, Kenshi destroyed Shao Kahn and saved Earthrealm from Armageddon. But he had not yet exacted revenge on Shang Tsung. The elusive sorcerer had hidden himself somewhere in Outworld. Jax allowed Kenshi access to a newly developed portal that permitted travel among realms. In return, Kenshi agreed to serve the fledgling Outerworld Investigation Agency. After countless missions he finally located Shang Tsung. With a roar, Kenshi plunged Sento through Shang Tsung's chest. The magical sword drew the souls of Kenshi's ancestors into itself, leaving Shang Tsung a withered husk. His vendetta fulfilled, Kenshi left Shang Tsung to die alone and powerless."

Alternate Timeline

 * Reiko: Fought against him in Shao Kahn's tournament, however, the outcome is unknown.
 * Shang Tsung: Deceived and left to die by him as he had been in the original timeline.
 * Scorpion: At some point after MK 2011, Kenshi aided Scorpion to "conquer" his demon and reform the Shirai Ryu. When Kenshi and his son, named Takeda, were pursued by the Red Dragon, Kenshi traveled to the Himalayan Mountains to seek aid from Scorpion and his clan. Once there, Scorpion saved Kenshi and his son by killing Hsu Hao. After recovering from his injuries, Kenshi trusted Scorpion to care for and train his son.
 * Hsu Hao: After Kenshi infiltrated the Red Dragon and "betrayed" the clan before rescuing Takeda, Daegon ordered Hsu Hao to kill Kenshi for his actions. Eventually, Hsu Hao was able to find and defeat Kenshi near the Himalayan Mountains, but before he could kill Kenshi, Scorpion arrived to rescue his ally and killed Hsu Hao.

Mortal Kombat X Comic
To be added...