| One night, Hot springs (2018) | 277,012 | 242 |
| One Night: Burlesque (2023) | 18,643 | 28 |
| One on One: Dr. J vs. Larry Bird (1983) | 142,395 | 69 |
| One Person Story (2018) | 7,686 | 24 |
| One Piece (2005) | 2,228,614 | 1,844 |
| One Piece - Nanatsu Shima no Daihihou (2002) | 24,905 | 29 |
| One Piece Bounty Rush (2018) | 350,537,645 | 87,303 |
| One Piece Grand Battle! 3 (2003) | 1,001,507 | 458 |
| One Piece Mansion (2001) | 1,107,252 | 101 |
| One Piece Odyssey (2023) | 99,520,633 | 56,096 |
| One Piece Treasure Battle! (2002) | 345,316 | 206 |
| One Piece Treasure Cruise (2014) | 193,195,312 | 33,580 |
| One Piece Unlimited Cruise 1 Wii (2008) | 3,281 | 22 |
| One Piece Unlimited Cruise: Episode 2 (2009) | 3,935,348 | 466 |
| One Piece: Become the Pirate King! (2000) | 23,079 | 35 |
| One Piece: Burning Blood (2016) | 200,987,045 | 25,713 |
| One Piece: Chopper no Daibouken (2003) | 18,740 | 17 |
| One Piece: Dai Kaizoku Colosseum (2016) | 887,424 | 107 |
| One Piece: Doragon Doriimu! (2005) | 34,976 | 19 |
| One Piece: Gear Spirit (2007) | 2,333,929 | 162 |
| One Piece: Gigant Battle! 2 - New World (2011) | 1,125,008 | 492 |
| One Piece: Going Baseball - Kaizoku Yakyuu (2004) | 3,750,506 | 57 |
| One Piece: Grand Adventure (2006) | 3,989,130 | 2,840 |
| One Piece: Grand Battle Swan Colosseum (2002) | 232,552 | 127 |
| One Piece: Grand Battle! (2005) | 5,630,758 | 2,945 |
| One Piece: Grand Cruise (2018) | 2,231,447 | 164 |
| One Piece: Great Pirate Colosseum (2016) | 411,343 | 158 |
| One Piece: Maboroshi no Grand Line Boukenki (2002) | 38,756 | 93 |
| One Piece: Niji no Shima Densetsu (2001) | 4,331 | 11 |
| One Piece: Ocean's Dream (2003) | 32,991 | 29 |
| One Piece: Pirate Warriors (2012) | 99,402,381 | 22,085 |
| One Piece: Pirate Warriors 2 (2013) | 54,817,202 | 8,297 |
| One Piece: Pirate Warriors 3 (2015) | 163,502,644 | 37,225 |
| One Piece: Pirate Warriors 4 (2020) | 533,686,420 | 107,927 |
| One Piece: Pirates' Carnival (2005) | 550,459 | 385 |
| One Piece: Romance Dawn (2012) | 4,837,257 | 2,412 |
| One Piece: Round the Land (2004) | 645,760 | 571 |
| One Piece: Super Grand Battle! X (2014) | 2,772,832 | 234 |
| One Piece: Thousand Storm (2016) | 18,713,262 | 6,105 |
| One Piece: Treasure Wars (2002) | 17,271 | 21 |
| One Piece: Treasure Wars 2 - Welcome to Buggyland (2002) | 3,540 | 10 |
| One Piece: Unlimited Adventure (2007) | 8,661,255 | 1,404 |
| One Piece: Unlimited Cruise (2008) | 7,428,146 | 1,913 |
| One Piece: Unlimited Cruise SP (2011) | 2,478,918 | 235 |
| One Piece: Unlimited World Red (2013) | 44,105,398 | 8,654 |
| One Piece: World Seeker (2019) | 92,845,610 | 21,083 |
| One Piece: Yume no Lufy Kaizokudan Tanjou (2001) | 22,925 | 81 |
| One Potion Please (2026) | 0 | 0 |
| One Punch Man: A Hero Nobody Knows (2020) | 113,208,297 | 11,032 |
| One Room Dungeon (2025) | 27,656 | 34 |
| One Rotten Oath (2025) | 0 | 0 |
| One S'More (2024) | 326 | 10 |
| One Shell Straight to Hell (2021) | 625,006 | 92 |
| One Socket (2024) | 71,443 | 20 |
| One Step After Fall (2022) | 72,544 | 198 |
| One Step From Eden (2020) | 6,113,170 | 5,426 |
| One Strike (2017) | 1,073,136 | 257 |
| One Tank Army (2023) | 39 | 1 |
| One Thousand Lies (2016) | 23,875 | 345 |
| One Troll Army (2016) | 2,941,602 | 324 |
| One True Hero (2022) | 97,303 | 223 |
| One Way Heroics (2012) | 1,582,133 | 2,385 |
| One Way To Die (2015) | 34,852 | 22 |
| The One We Found (2018) | 119,360 | 70 |
| One Wheel Guy (2022) | 82,188 | 19 |
| The one who pulls out the sword will be crowned king (2022) | 18,693,803 | 580 |
| The One Who Stands Behind (2024) | 94 | 3 |
| One-armed cook (2022) | 21,221,028 | 5,625 |
| One-Eyed Lee and the Dinner Party (2019) | 33,298 | 93 |
| One-Eyed Likho (2025) | 211,855 | 213 |
| One-inch Tactics (2024) | 20,023 | 85 |
| One: Secret Empire (2025) | 0 | 0 |
| Onechanbara Origin (2019) | 441,232 | 302 |
| Onechanbara Z2: Chaos (2014) | 9,924,352 | 4,911 |
| Onechanbara: Bikini Samurai Squad (2006) | 797,640 | 516 |
