Devil (Japanese: 魔王, Hepburn: Maō, lit. 'The Devil', or 'Demon King'), officially stylized as dEVIL, is a Japanese remake of the Korean suspense drama series titled The Devil (Korean: 마왕; RR: Mawang) which aired on KBS 2TV in 2007. The drama stars Satoshi Ohno of Arashi and Toma Ikuta, both under the talent agency Johnny & Associates.

Ryo Naruse (Satoshi Ohno) is a two-faced lawyer: on the surface, he is a kind-hearted soul, representing the poor and earning the nickname "The Angel Lawyer" from the press; but unbeknownst to anyone else, he is also a "devil," meticulously plotting the perfect revenge against those responsible for his younger brother's death. Naoto Serizawa (Toma Ikuta) is a gung-ho detective whose overzealous methods mask a dark past which he is trying to overcome. When a family acquaintance of Serizawa's is murdered, Serizawa is thrust in the middle of a multiple-homicide case which stirs up memories of a dark event from his past.

The theme song for this series is "Truth" by Arashi, a popular Japanese boy band which Satoshi Ohno is the leader of. In a preview of "Truth" promotional video on TBS morning entertainment news program 2jichaō, Ohno explains that the meaning of the song is very close to the content and feel of the whole drama. Arashi displayed their dancing in the promotional video of "Truth" with Ohno as the lead. It was revealed in Maō's official blog (written by the staffs / producers and posted at their official site) Ohno diligently practiced the intricate dance move in between takes because of his busy schedule.

• Satoshi Ohno as Ryo Naruse
• Toma Ikuta as Naoto Serizawa
• Ryoko Kobayashi as Shiori Sakita
• Kei Tanaka as Hitoshi Kasai
• Shugo Oshinari as Mitsuru Souda
• Tomohiro Waki as Yosuke Ishimoto
• Misa Uehara as Kaoru Takatsuka
• Mai Shinohara as Eri Nishina
• Yutaka Shimizu as Keita Yamano
• Kisuke Iida as Kanrikan Ishihara
• Toshihide Tonesaku as Takashi Kurata
• Michiko Kichise as Mari Serizawa
• Hitori Gekidan as Noriyoshi Serizawa
• Yuji Miyake as Hiromichi Nakanishi
• Koji Ishizaka as Eisaku Serizawa

• Hiroki Kouno as young Toomo Manaka
• Toshi Takeuchi as Hideo Manaka
• Haruki Kimura as young Naoto Serizawa
• Kayano Masuyama as young Shiori Sakita
• Yuto Uemura as young Hitoshi Kasai
• Haruo Honma as young Mitsuru Souda
• Ryunoshin Nakamura as young Yosuke Ishimoto

• Kazunari Ninomiya as Masayoshi Kumada (episode 1)
• Mayumi Asaka as Yoshimi Manaka (episodes 1, 2, 4)
• Tetsuo Morishita as Takahiro Kumada (episodes 1, 2)
• Kitaro as Kunio Hayashi (episodes 1, 2)
• Kaoru Okunuki as Tae Shintani (episodes 2–4)
• Momoka Oono as Sora Shintani (episodes 2–5, 7)
• Naomasa Musaka as Takahiro Ikehata (episodes 4–7)
• Yūka as Makiko Naruse (episodes 4–7)
• Outa Tanino as the real Ryo Naruse (episode 5)
• Kyusaku Shimada as Oosumi Kazuma (episodes 5–7, 9)

• Official website Archived September 19, 2017, at the Wayback Machine (in Japanese)
• Weekly ratings (in Japanese)