Koji Yamamoto is a character appearing in the Yu-Gi-Oh! 5D's Tag Force games.
In the English version, his name is changed to Bawnji, who is a character from the previous Tag Force games, known as Yasuhiro Yamaguchi in the Japanese version.
Appearances
Tag Force 4

In the second event of Mina Simington's story, the Player and Mina duel against Leo and Bawnji.
In his own story, he competes with the Player against Carly Carmine and Luna in the Preliminaries, Misty Tredwell and Leo in the quarter finals, Crow Hogan and Akiza Izinski in the semi-finals and Jack Atlas and Yusei Fudo in the finals. For completing the story, the Player will receive a photo of himself, Taku and Bawnji called "Tops Boy".
Tag Force 5
In Duel Academy Luna's first event, Bawnji and Emma Tag Duel against the player and Luna.
Gifts
The player is able to give Bawnji gifts. The following tables detail how much he likes or dislikes the gifts.
Tag Force 4
Strongly likes | Likes | Neutral | Dislikes | Strongly dislikes | |
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Household | |||||
Figures | |||||
Card accessories | |||||
Foods & Beverages | |||||
Misc |
Tag Force 5
Strongly likes | Likes | Neutral | Dislikes | Strongly dislikes | |
---|---|---|---|---|---|
Household | |||||
Figures | |||||
Card accessories | |||||
Foods & Beverages | |||||
Misc |
Tag Force 6
Strongly likes | Likes | Neutral | Dislikes | Strongly dislikes | |
---|---|---|---|---|---|
Household | |||||
Figures | |||||
Card accessories | |||||
Foods & Beverages | |||||
Misc |
Decks
Bawnji uses Machine Decks based around cards from the Gradius video game series.
Tag Force 4
In Yu-Gi-Oh! 5D's Tag Force 4, Bawnji uses Decks titled "St. Gradius Elementary School" (聖グラディウス小学校, Hijiri Guradiusu Shōgakkō)
- Gradius x2
- Blue Thunder T-45 x2
- D.D. Warrior Lady
- Falchionβ x2 (Favorite)
- Flint Lock x2
- Honest x2
- Jade Knight x2 (Favorite)
- Shining Angel x3
- Victory Viper XX03 x2 (Favorite)
- Gradius x3
- Falchionβ x3
- Gradius' Option x3
- Honest x3 (D)
- Jade Knight x3
- Shining Angel x3
- Victory Viper XX03 x3
- Gradius x3
- Falchionβ x3
- Gradius' Option x3
- Honest x3
- Jade Knight x3
- Shining Angel x3
- Victory Viper XX03 x3
Tag Force 5
In Yu-Gi-Oh! 5D's Tag Force 5, Bawnji uses Decks titled "St. Nemesis Academy" (聖ネメシス学園, Hijiri nemeshisu gakuen)
- Gradius x2 (Favorite)
- Falchionβ x2
- Flint Lock x2
- Gradius' Option x2
- Honest x2
- Jade Knight x2
- Lord British Space Fighter x2 (Favorite)
- Shining Angel x2
- Victory Viper XX03 x2 (Favorite)
- Cyclon Laser
- Flint x2 (D)
- Flint Missile x2
- Hidden Armory x2
- Limiter Removal
- Luminous Spark x2 (D)
- Mystical Space Typhoon
- Power Capsule x2 (Favorite)
- Shrink x2
- Swords of Revealing Light
- United We Stand x2
- Delta Tri x2
- Falchionβ x2
- Honest x3
- Jade Knight x2
- Lord British Space Fighter x2
- Shining Angel x3
- Victory Viper XX03 x3
- Trigon x2
Tag Force 6
In Yu-Gi-Oh! 5D's Tag Force 6, Bawnji uses Decks titled "St. Lifeforce Institute" (聖ライフフォース学園, Hijiri raifufōsu gakuen)
- Gradius x2
- Blue Thunder T-45 x2
- Delta Tri x2
- Falchionβ x2 (Favorite)
- Gradius' Option x2
- Honest
- Jade Knight x2 (Favorite)
- Lord British Space Fighter x2 (Favorite)
- Victory Viper XX03 x2 (Favorite)
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