Teruto Ishihara (born July 23, 1991) is a Japanese professional mixed martial artist who previously competed in the Featherweight division of the Ultimate Fighting Championship. A professional competitor since 2011, he has formerly competed for Shooto.

Ishihara began his professional MMA career in 2011, debuting in the Shooto promotion. Over the next four-and-a-half years he amassed a record of 7–2–1.

In June 2015, Ishihara was announced as one of the eight featherweights competing on Road to UFC: Japan, a show in the style of The Ultimate Fighter. Ishihara faced Tatsuya Ando in the quarterfinals and won by majority decision. He then faced Akiyo Nishiura in the semifinals and again won by decision.

Ishihara ultimately faced Mizuto Hirota in the finals at UFC Fight Night 75 on September 27, 2015. The bout was ruled a split draw with no winner decided. The UFC announced post-fight that Hirota and Ishihara would both be awarded contracts.

In his second fight for the promotion, Ishihara faced Julian Erosa on March 5, 2016, at UFC 196. Ishihara won the fight via KO early in the second round.

Ishihara next faced Horacio Gutiérrez on August 6, 2016, at UFC Fight Night 92. Ishihara won the fight via first-round KO and subsequently received a Performance of the Night bonus.

Ishihara faced Artem Lobov on November 19, 2016, at UFC Fight Night 99. He lost the fight via unanimous decision.

Ishihara faced Gray Maynard on July 7, 2017, at The Ultimate Fighter 25 Finale. He lost the fight by unanimous decision.