| In Kanji | Full shikona | Full original name | Birthplace | Birthdate | Heya | First | Current rank | Highest rank | Previous shikona |
| 巨東・宣浩 | OAZUMA Norihiro | Fukaya Norihiro | Fukushima | 1990.05.10. | Tamanoi | 2006 Natsu | West Sandanme 73 | Sandanme 19 | |
| 小浜海・晃基 | OBAMAUMI Koki | Yamamoto Koki | Nagasaki | 1990.08.10. | Sakaigawa | 2009 Hatsu | East Jonidan 45 | Jonidan 45 | |
| 扇富士・利光 | OGIFUJI Toshimitsu | Nakazawa Toshimitsu | Osaka | 1977.04.23. | Isegahama | 1993 Haru | East Sandanme 46 | Makushita 41 | Mikunifuji, Aogifuji |
| 大原・禎貴 | OHARA Yoshiki | Ohara Yoshiki | Aichi | 1993.12.14. | Shikoroyama | 2009 Haru | East Jonidan 114 | Jonidan 98 | |
| 大日富士・琢美 | OHIFUJI Takumi | Hina Takumi | Osaka | 1991.10.02. | Isegahama | 2007 Natsu | West Jonidan 53 | Jonidan 34 | Hina |
| 大五十嵐・俊紀 | OIGARASHI Toshiki | Igarashi Toshiki | Fukushima | 1992.11.11. | Hakkaku | 2008 Haru | East Jonokuchi 2 | Jonidan 86 | |
| 大伊藤・竜司 | OITO Ryuji | Ito Ryuji | Mie | 1976.05.20. | Otake | 1992 Haru | West Jonidan 93 | Sandanme 36 | |
| 桜花・剛 | OKA Tsuyoshi | Miyajima Tsuyoshi | Saitama | 1983.10.01. | Nakamura | 1999 Haru | West Sandanme 57 | Sandanme 38 | |
| 大木下・祐樹 | OKINOSHITA Yuki | Kinoshita Yuki | Kagoshima | 1992.10.11. | Kokonoe | 2008 Natsu | West Jonidan 59 | Jonidan 45 | |
| 隠岐の海・歩 | OKINOUMI Ayumi | Fukuoka Ayumi | Shimane | 1985.07.29. | Hakkaku | 2005 Hatsu | West Juryo 14 | Juryo 7 | Fukuoka, Okinoumi, Fukuoka |
| 桜児龍・裕樹 | OKORYU Hiroki | Ota Hiroki | Kagoshima | 1989.02.14. | Sakaigawa | 2007 Haru | West Sandanme 9 | Sandanme 9 | Ota |
| 青海龍・正明 | OMIRYU Masaaki | Kitamura Masaaki | Yamaguchi | 1978.04.04. | Hanaregoma | 2001 Haru | East Makushita 32 | Makushita 13 | Kitamura, Omiryu |
| 鬼嵐・力 | ONIARASHI Chikara | Ariunbayar Ariunjargal | Mongolia | 1982.06.13. | Asahiyama | 2000 Nagoya | East Makushita 27 | Makushita 23 | Daionji, Daiki |
| 阿武山・純平 | ONOYAMA Junpei | Tsuda Junpei | Fukuoka | 1978.02.01. | Onomatsu | 1996 Haru | West Jonidan 81 | Sandanme 80 | |
| 大露羅・満 | ORORA Mitsuru | Mihahanov Anatoliy Valeryevich | Russia | 1983.04.26. | Kitanoumi | 2000 Haru | West Sandanme 6 | Makushita 48 | |
| 大澤・弘規 | OSAWA Hiroki | Osawa Hiroki | Hokkaido | 1984.08.13. | Arashio | 2005 Natsu | East Jonokuchi 1 | Jonidan 53 | |
| 大瀬海・義嗣 | OSEUMI Yoshitsugu | Yasumitsu Yoshitsugu | Miyazaki | 1977.05.18. | Onomatsu | 1998 Natsu | East Jonidan 28 | Sandanme 30 | |
| 太田・剛希 | OTA Goki | Ota Goki | Tokushima | 1987.08.08. | Kitanoumi | 2003 Haru | West Sandanme 96 | Sandanme 7 | Kagemaru |
| 大筑波・秀樹 | OTSUKUBA Hideki | Akiba Hideki | Ibaraki | 1975.06.23. | Isenoumi | 1991 Haru | West Jonidan 103 | Jonidan 45 | |
| 大和田・健一 | OWADA Kenichi | Owada Kenichi | Saitama | 1983.07.19. | Miyagino | 2006 Haru | East Jonidan 69 | Jonidan 31 | |
| 大若・大和 | OWAKA Yamato | Nakamoto Yamato | Osaka | 1989.11.02. | Hanakago | 2005 Haru | East Jonidan 46 | Jonidan 21 | Nakamoto |
| 尾張富士・功 | OWARIFUJI Isao | Iitani Isao | Aichi | 1989.10.14. | Azumazeki | 2005 Haru | East Sandanme 100 | Sandanme 96 | Iitani |
| 尾崎海・善信 | OZAKIUMI Yoshinobu | Ozaki Yoshinobu | Shizuoka | 1986.01.20. | Dewanoumi | 2008 Natsu | East Sandanme 1 | Makushita 29 |