Gintama Katana ja kirenai mono ga arau (2005– ) Online
- Original Title :
- Katana ja kirenai mono ga arau
- Genre :
- TV Episode / Animation / Action / Comedy / Sci-Fi
- Year :
- 2005–
- Cast :
- Tomokazu Sugita,Daisuke Sakaguchi,Rie Kugimiya
- Type :
- TV Episode
- Time :
- 24min
- Rating :
- 7.0/10
Yorozuya investigates an underground-arena at the request of Okita.
| Episode credited cast: | |||
 | Tomokazu Sugita | - | Gintoki Sakata (voice) |
 | Daisuke Sakaguchi | - | Shinpachi Shimura (voice) |
 | Rie Kugimiya | - | Kagura (voice) |
 | Kazuya Nakai | - | Toshiro Hijikata (voice) |
 | Ken'ichi Suzumura | - | Sogo Okita (voice) |
 | Mikako Takahashi | - | Tsu Terakado (voice) |
| Rest of cast listed alphabetically: | |||
| Shiho Hisajima | - | Child A (voice) |
| Takafumi Kawakami | - | Child D (voice) |
| Dai Matsumoto | - | Onijishi (voice) |
 | Jôji Nakata | - | Kidomaru Doshin (voice) |
| Sayaka Narita | - | Child C (voice) |
| Masayuki Omoro | - | Tendoshu (voice) |
| Misaki Sekiyama | - | Child B (voice) |
| Hidenari Ugaki | - | Director (voice) |