|This article is about a/an episode in Juken Sentai Gekiranger.|
Sixth Lesson - Juwān! …What's That? (修行その６ ジュワーン！って、何？, Shugyō Sono Roku: Juwān! 'tte, Nani?) is the sixth episode of Juken Sentai Gekiranger; it is the third episode of the battle with the Five Venom Fists, focusing on Retsu Fukami and his battle with Moriya.
Retsu tries to encourage himself to find passion to fight a Venom Fist who eludes the Gekiranger by walking on walls.
A strange picture dealer named Pierre Fujishiro comes to SCRTC to obtain a painting from Retsu, which is still incomplete. As Retsu's past is unveiled, Rin Jū Gecko-Ken user Moriya of the Five Venom-Ken arrives to cause havoc. The Gekirangers intervene, but are overwhelmed by Moriya's unpredictable tactics and fighting style, forcing them to retreat. During another training session involving window-washing, Ran reveals to Jan that just fighting to win is not always Retu's goal; to him, true victory is obtained when he beats his opponent at their own game. In their second encounter, Retsu manages to knock Moriya off his wall with artistic feeling at his side, forcing a fight between him and Geki Tohja. Moriya reveals his Secret Ringi, Rapid-Growth Arm, much to the chagrin of Mere, as she assumed that Moriya was the True Poison user. Regardless, he is destroyed much to Mere's dismay, with only three left to spy on. Retsu soon completed his painting afterward with Pierre asking to have it.
- Jan Kandou (漢堂 ジャン Kandō Jan): Hiroki Suzuki (鈴木 裕樹 Suzuki Hiroki)
- Ran Uzaki (宇崎 ラン Uzaki Ran): Mina Fukui (福井 未菜 Fukui Mina)
- Retsu Fukami (深見 レツ Fukami Retsu): Manpei Takagi (高木 万平 Takagi Manpei)
- Master Sha-Fu (マスター・シャーフー Masutā Shā Fū, Voice): Ichirō Nagai (永井 一郎 Nagai Ichirō)
- Miki Masaki (真咲 美希 Masaki Miki): Kazue Itoh (伊藤 かずえ Itō Kazue)
- Rio (理央 Rio): Hirofumi Araki (荒木 宏文 Araki Hirofumi)
- Mele (メレ Mere): Yuka Hirata (平田 裕香 Hirata Yuka)
- Bae (バエ Voice): Akira Ishida (石田 彰 Ishida Akira)
- Moriya (モリヤ Moriya, Voice): Kōichi Sakaguchi (坂口 候一 Sakaguchi Kōichi)
- Sorisa (ソリサ Sorisa, Voice): Shinobu Adachi (安達忍 Adachi Shinobu)
- Maga (マガ Maga, Voice): Takashi Nagasako (長嶝 高士 Nagasako Takashi)
- Braco (ブラコ Burako, Voice): Kunihiko Yasui (安井邦彦 Yasui Kunihiko)
- Pierre Fujiyo: Toshiya Toyama (遠山俊也 Tōyama Toshiya)
- OL: Iona Mihara (三原伊織奈 Mihara Iona)
- Customer: Midori Kodachi (木立 美鳥 Kodachi Midori)
- Retsu Fukami(Child): Nao Fujisaki (藤崎 直 Fujisaki Nao)
- As part of Super Hero Time, this episode aired alongside Kamen Rider Den-O episode 9, My Strength Has Made You Cry
- Pre-Credits: GekiTonfa
- Both Retsu and Rio reference the skill and abilities of Retsu's older brother, who is powerful but a "lone wolf"; more will be revealed on his fate later in the series.
Juken Sentai Gekiranger Volume 2 features episodes 5-8: Lesson 5: Uja-Uja! What Should I Do?, Lesson 6: Juwān! …What's That?, Lesson 7: Shuba-Shuba Dancing!, and Lesson 8: Koto-Koto… Earnestly Koto-Koto.