ONE: High School Heroes
- Year:
- 2025
- Director:
- N/A
South Korea
One Last Order
- Year:
- 2019
- Director:
- Gustavo Kawashita, Thais Lima
One-Line
- Year:
- 2017
- Director:
- Kyung-Mo Yang
One Messed Up Family
- Year:
- 2014
- Director:
- Jin-soo Noh
One-minded
- Year:
- 2016
- Director:
- Forest Ian Etsler, Sébastien Simon
One More Happy Ending
- Year:
- 2016
- Director:
- N/A
One More Time
- Year:
- 2016
- Director:
- N/A
One Night
- Year:
- 2014
- Director:
- Jho Kwang-soo Kim
One Night in an Unfamiliar Place
- Year:
- 1980
- Director:
- Eung-cheon Kim
One Night Only
- Year:
- 2014
- Director:
- Jho Kwang-soo Kim, Tae-yong Kim
One Night Stand
- Year:
- 2010
- Director:
- Hoon Jang, Yoo-rim Lee, Yong-geun Min
ONE OK ROCK Detox Japan Tour 2025 at Nissan Stadium in Cinemas
- Year:
- 2026
- Director:
- Naoto Amazutsumi
The One & Only
- Year:
- 2011
- Director:
- N/A
One on One
- Year:
- 2014
- Director:
- Kim Ki-duk
One Ordinary Day
- Year:
- 2021
- Director:
- N/A
One Perfect Day
- Year:
- 2013
- Director:
- Jee-woon Kim
One Returns and the Other Leaves
- Year:
- 1972
- Director:
- Kwon-taek Im
The One Serving House
- Year:
- 2021
- Director:
- N/A
One Shining Day
- Year:
- 2006
- Director:
- Jong-kwan Kim, Sung-ho Kim, Dong-hyun Min
One's Own Love
- Year:
- 2022
- Director:
- N/A
One Spring Night
- Year:
- 2019
- Director:
- N/A
One Step
- Year:
- 2017
- Director:
- Jai-hong Juhn
One Step More to the Sea
- Year:
- 2009
- Director:
- Ji-Young Che
One Sunny Day
- Year:
- 2014
- Director:
- N/A
One the Woman
- Year:
- 2021
- Director:
- N/A
One Thing She Doesn't Have
- Year:
- 2014
- Director:
- Yoo Jung-Hwan
Oneuldo Jisonghabnida
- Year:
- 2024
- Director:
- N/A
Oneul yeoja
- Year:
- 1989
- Director:
- Cheol-su Park
One Warm Word
- Year:
- 2013
- Director:
- N/A
One Way or Another (Reflections of a Psykokiller)
- Year:
- 2012
- Director:
- Edgar Pêra
One Way Ticket
- Year:
- 2017
- Director:
- Youjin Do
One Well-Raised Daughter
- Year:
- 2013
- Director:
- N/A
The One Who Holds Sovereignty Over Everything
- Year:
- 2019
- Director:
- N/A
Ongoing Loved One
- Year:
- 2022
- Director:
- N/A
Ongoing Smile
- Year:
- 2013
- Director:
- Mohsen Makhmalbaf
Onli yoo
- Year:
- 2005
- Director:
- N/A
Only Boy
- Year:
- 2015
- Director:
- N/A
Only God Knows Everything
- Year:
- 2025
- Director:
- Seung-Hwan Paek
Only Love
- Year:
- 2014
- Director:
- N/A
Only My Love
- Year:
- 2014
- Director:
- N/A
Only One Person
- Year:
- 2021
- Director:
- N/A
Only You
- Year:
- 2022
- Director:
- N/A
Only You, My First Love
- Year:
- 2023
- Director:
- N/A
On my way Home
- Year:
- 2018
- Director:
- Seung Kyu Lee
On the Campus
- Year:
- 2019
- Director:
- N/A
On the Road
- Year:
- 2014
- Director:
- Poong-ki Kim
On the road, Khaosan Tango
- Year:
- 2020
- Director:
- Beomsam Kim
On the Road, Two
- Year:
- 2006
- Director:
- Tae-yong Kim
On the Sand House
- Year:
- 2023
- Director:
- N/A
On the Verge of Insanity
- Year:
- 2021
- Director:
- N/A
On the Way to South
- Year:
- 2025
- Director:
- Sang-rae Kim
On the Way to the Airport
- Year:
- 2016
- Director:
- N/A
On the White Planet
- Year:
- 2014
- Director:
- Bum-wook Hur
On Your Road We Are
- Year:
- 2022
- Director:
- N/A
(OO)
- Year:
- 2019
- Director:
- Seoro Oh
Oohlala Couple
- Year:
- 2012
- Director:
- N/A
Open
- Year:
- 2015
- Director:
- Jun Beom
O'PENing - XX+XY
- Year:
- 2022
- Director:
- Soh Yoon Lee
Open Shutters
- Year:
- 2020
- Director:
- Youjin Do
Open the Door
- Year:
- 2020
- Director:
- N/A
Operation Rock the Troops
- Year:
- 2014
- Director:
- Matthew JC
Opium War
- Year:
- 2008
- Director:
- Siddiq Barmak
Oppaga itda
- Year:
- 1979
- Director:
- Doo-yong Lee
Orange Light
- Year:
- 2014
- Director:
- N/A
Orange Marmalade
- Year:
- 2015
- Director:
- N/A
Orange nara
- Year:
- 1993
- Director:
- Jin-seon Yu
Ordinary Days
- Year:
- 2011
- Director:
- Inan
The Ordinary Life of Ms. 'O'!
- Year:
- 2015
- Director:
- N/A
Ordinary Love
- Year:
- 2012
- Director:
- N/A
Ordinary Person
- Year:
- 2017
- Director:
- Bong-han Kim
Origin of Monogamy
- Year:
- 2013
- Director:
- Min Kyeol
The Orphanage
- Year:
- 2019
- Director:
- Shahrbanoo Sadat
Oseam
- Year:
- 1990
- Director:
- Cheol-su Park
Osikamula-e buneun balam
- Year:
- 2021
- Director:
- Myoung-Yoon Kim
Ossaghan Donggeo
- Year:
- 2022
- Director:
- Hwang Kyung-Sung
The Other Child
- Year:
- 2022
- Director:
- Jin-young Kim
The other side of Dooman River
- Year:
- 2016
- Director:
- Sewoong Bae
Our Baseball
- Year:
- 2019
- Director:
- N/A
Our Beloved Summer
- Year:
- 2021
- Director:
- N/A
Our Body
- Year:
- 2018
- Director:
- Ka-ram Han
Our Chocolate Moments
- Year:
- 2025
- Director:
- N/A
Our Dating Sim
- Year:
- 2023
- Director:
- N/A
Our D-Day
- Year:
- 2023
- Director:
- N/A
Our First: Seventeen
- Year:
- 2021
- Director:
- N/A
Our Friend Power 5
- Year:
- 1989
- Director:
- Ho-jin Park
Our Friendship 0.5cm
- Year:
- 2019
- Director:
- N/A
Our Gap-soon
- Year:
- 2016
- Director:
- N/A
Our Golden Days
- Year:
- 2025
- Director:
- N/A
Our Happy Days
- Year:
- 2026
- Director:
- N/A
Our Happy Ending
- Year:
- 2008
- Director:
- N/A
Our Joyful Young Days
- Year:
- 1987
- Director:
- Bae Chang-ho
Our Love Story
- Year:
- 2017
- Director:
- N/A
Our Love Story
- Year:
- 2016
- Director:
- Hyun-ju Lee
Our Love Triangle
- Year:
- 2024
- Director:
- N/A
Our Midnight
- Year:
- 2021
- Director:
- Jung-Eun Lim
Our Movie
- Year:
- 2025
- Director:
- N/A
Our Nation: A Korean Punk Rock Community
- Year:
- 2002
- Director:
- Tim Tangherlini, Stephen J. Epstein
Our President
- Year:
- 2017
- Director:
- Chang-jae Lee
Ours
- Year:
- 2019
- Director:
- N/A
Our School
- Year:
- 2007
- Director:
- Myung-Joon Kim