UFC 25: Ultimate Japan 3 was a mixed martial arts event held by the Ultimate Fighting Championship on April 14, 2000 at the Yoyogi National Gymnasium in Tokyo, Japan.

UFC 25 was headlined by a fight between Tito Ortiz and Wanderlei Silva, held to determine the new Light Heavyweight Champion following Frank Shamrock's retirement.

The Octagon announcer was local Sanshiro Matuyama instead of the regular Bruce Buffer.

This event also featured an interview with John Perretti, the UFC matchmaker at the time.

Spike published a DVD release exclusively in Japan, with a wider video release occurring after UFC was purchased by Zuffa years later as part of a DVD collection covering events initially unreleased by SEG Sports.