Manga Debut : Round 1
Anime Debut : Round 1 (Season 1)
Native Name : 幕之内 一歩
Family : Kazuo Makunouchi (Father)
              Hikoro Makunouchi (Mother)
              Wanpo (Pet)
Gender : Male
Birth Day :  November 23, 1973
Home land : Tokyo, Japan
Height : 164 cm (5'4)
Reach : 165.1 (65 in)
Previous Weight  Class(es) : Featherweight
Boxing Record :  Matches: 26, Wins: 23, Win By Ko: 23, Losses: 3, Draws: 0
Championship(s) : Eastern Japan Rookie King

                                All Japan Rookie King
                                JBC Featherweight Championship
Nickname(s) : Wind God (風神, Fūjin)

                        The Boy with the Dempsey Roll (デンプシー・ロールの少年,
                        Denpushī Rōru no Shōnen) Unofficial King of the OPBF

 Manga Debut : Round 1
Anime Debut : Round 1 (Season 1)
Native Name :鷹村 守
Family : Suguru Takamura (Older Brother)
              Kyoka Takamura (Older Brother)
              Wataru Takamura (Younger Brother)
Gender : Male
Birth Day : July 7,  1969
Home land : Tokyo, Japan
Height : 185 cm (6'1)
Reach : 185.8 (73 in)
Current Weight Class(es) : Super  Middleweight
Previous Weight  Class(es) :  Junior Middlweight
Boxing Record :  Matches: 28, Wins: 28, Win By Ko: 28, Losses: 0, Draws: 0
Championship(s) : Eastern Japan Rookie King

                                 All Japan Rookie King
                                JBC Middleweight Champion

                                WBC Junior Middleweight Champion

                                WBC Middleweight Champion

                                WBA Middleweight Champion
                                WBC Super Middleweight Champion
Nickname(s) : "Almighty"

                        "Japanese Hawk"

                        "Japan's KO King"

                        "Bear Slayer"

Manga Debut : Round 2
Anime Debut : Round 2 (Season 1)
Native Name : 宮田一郎
Family : Miyata (Father)
              Ichiro's Mother (Mother)
Gender : Male
Birth Day :  August 27,1973
Home land : Tokyo, Japan
Height : 171.5 cm (5'7 ½ )
Reach : 175.3 (69 in)
Current Weight Class(es) : Featherweight|
Boxing Record :  Matches: 28, Wins: 26, Win By Ko: 22, Losses: 1, Draws: 1
Championship(s) : OPBF Featherweight Champion
Nickname(s) : "Thunder God" (雷神, Raijin)
                        "Prince of Counters" 

Manga Debut : Round 2
Anime Debut : Round 2 (Season 1)
Native Name : 鴨川源二
Family : ???
Gender : Male
Birth Day : January 15,1917
Home land : Tokyo, Japan
Height : 162 cm (5'3)
Reach : ???
Previous Weight Class(es) : Bantamweight
Boxing Record :  Matches: 9, Wins: 6, Win By Ko: 6, Losses: 2, Draws: 1
Championship(s) : ???
Nickname(s) : ???

Manga Debut : Round 88
Anime Debut : Round 28 (Season 1)
Native Name : 千堂 武士
Family : Takeshi's Grandmother (Grandmother)
Gender : Male
Birth Day : May 5, 1972
Home land : Osaka, Japan
Height : 167.5 cm (5'6)
Reach : 168 cm (66 in)
Current Weight Class(es) : Featherweight
Boxing Record :  Matches: 24, Wins: 22, Win By Ko: 21, Losses: 2, Draws: 0 
Championship(s) : WBA Featherweight (Super) Champion
Nickname(s) : The Naniwa Tiger (浪速の虎, Naniwa no Tora)

                       Rocky of Naniwa (浪速のロッキー, Naniwa no Rokkī)

                       Mexican Killer (メキシカン キラー, Mekishikan Kirā)[1]

                       The Naniwa Tomcat Tigre
             

Manga Debut : Round 174
Anime Debut : Round 53 (Season 1)
Native Name :  Ricardo Martinez
Family : ???
Gender : Male
Birth Day : 196X
Home land : Mexico
Height : 168.3 cm (5'6)
Reach : 171 cm (67.4 in)
Current Weight Class(es) : Featherweight
Boxing Record :  Matches: 70, Wins: 70, Win By Ko: 66, Losses: 0, Draws: 0
Championship(s) : WBA Featherweight (Super) Champion
Nickname(s) : Living Legend
                        National Hero

                        Quetzalcóatl (太陽神 (Taiyō-shin), meaning "Sun God" (ケツァルコ
                        Ketsuarukoatoru))

                        Hero of Mexico

                        Huītzilōpōchtli (ウィツィロポチトリ, Uitsuiropochitori)

                        Pride of Mexico
                            Omega (Ω) (オメガ, Omega)
             

Manga Debut : Round 15
Anime Debut : Round 9 (Season 1)
Native Name :  間柴了
Family : Kumi Mashiba (Younger Sister)
Gender : Male
Birth Day : June 30,1971
Home land : Tokyo, Japan
Height : 177 cm (5'8)
Reach : 187 cm (74 in)
Current Weight Class(es) : Lightweight
Boxing Record :  Matches: 25, Wins: 23, Win By Ko: 19, Losses: 2, Draws: 0
Championship(s) : JBC Junior Lightweight Champion
                                OPBF Lightweight Champion  
Nickname(s) :  "The Death God"

                         "The Grim Reaper"
                          "The Executioner" 

Manga Debut : Round 462
Anime Debut : Round 111 (S3 - 07)
Native Name : 沢村 竜平
Family : ???
Gender : Male
Birth Day : April 19,1995
Home land :  Nagoya, Japan
Height : 170 cm (5'7)
Reach : 170 cm (66 in)
Previous Weight Class(es) : Junior Lightweight , Featherweight
Boxing Record :  Matches: 14, Wins: 11, Win By Ko: 5, Losses: 3, Draws: 0
Championship(s) : JBC Junior Lightweight Championship  
Nickname(s) : "The Owari Dragon" (尾張の竜, Owari no Ryū)

                        "The Deathblow Dragon"

                        "The Mad Dog"
                        "The Dragon of Nagoya" 

Manga Debut : Round 341
Anime Debut : Round 9 (Season 2)
Native Name : 板垣学
Family :  Manabu and Nanako's Father (Father)

                Manabu and Nanako's Mother (Mother)|
                Nanako Itagaki (Sister)  

Gender : Male

Birth Day : August 14, 1975

Home land :  Tokyo, Japan

Height : 168 cm (5'6)

Reach : 168 cm

Current Weight Class(es) : Featherweight

Boxing Record :  Matches: 19, Wins: 17, Win By Ko: 10, Losses: 2, Draws: 0

Championship(s) : Eastern Japan Rookie King

Nickname(s) : "Chronos (クロノス, Kuronosu)"

                         "Speed King"
                        "The New Model"

Manga Debut : Round 225
Anime Debut : Round 65 (Season 1)
Native Name : 猫田銀八
Family :  Hachi (Pet)
                Wanpo and five other dogs (Pets)  
Gender : Male
Birth Day : ???
Home land : Japan
Height : ???
Reach : ???
Previous Weight Class(es) : Bantamweight
Boxing Record :  Matches: 10, Wins: 6, Win By Ko: 6, Losses: 3, Draws: 1
Championship(s) : ???
Nickname(s) : ???

Manga Debut : Round  17
Anime Debut : Round 3 (Season 1)
Native Name : 猫田銀八
Family : Tatsuya's Father (Father)

               Tatsuya's Mother (Mother)
                Reiko (Pet)

Gender : Male

Birth Day : October 10, 1971

Home land : Tokyo, Japan

Height : 171 cm (5'7)

Reach :  171  (67)

Current Weight Class(es) : Junior Lightweight

Boxing Record :  Matches: 29, Wins: 17, Win By Ko: 12, Losses: 6, Draws: 6

Championship(s) :  Rank 7 (JBC)

Nickname(s) : "Aokimura" 

Manga Debut : Round  6
Anime Debut : Round 3 (Season 1)
Native Name : 青木勝
Family : Taihei Aoki (Younger Brother)  
Gender : Male
Birth Day : September 9, 1971
Home land : Tokyo, Japan
Height : 171 cm (5'7)
Reach :  171 
Current Weight Class(es) : Lightweight
Boxing Record :  Matches: 29, Wins: 19, Win By Ko: 12, Losses: 7, Draws: 3
Championship(s) :  Rank 3 (JBC)
Nickname(s) : "Aokimura"[1]

                         "Frog Man"

                         "The Brocco Man"