The twentieth season of the Case Closed anime was directed by Kenji Kodama and Yasuichiro Yamamoto and produced by TMS Entertainment and Yomiuri Telecasting Corporation. The series is based on Gosho Aoyama's Case Closed manga series. In Japan, the series is titled Detective Conan (名探偵コナン, Meitantei Conan) but was changed due to legal issues with the title Detective Conan. The series focuses on the adventures of teenage detective Shinichi Kudo who was turned into a child by a poison called APTX 4869, but continues working as a detective under the alias Conan Edogawa.
The episodes use nine pieces of theme music: four opening and five ending themes. The first opening theme is "tear drops" by Caos Caos Caos and is used up to episode 612. The second opening theme is "Don't Wanna Lie" by B'z from episodes 613 to 626. The third opening theme is "Misty Mystery" by Garnet Crow from episodes 627 to 641. The fourth opening is "Miss Mystery" by Breakerz is used from 642 and onwards. The first ending theme, Jûgoya Kuraishisu (Kimi ni Aitai) (十五夜クライシス～君に逢いたい～?, lit. "Full Moon Night's Crisis (I Want to See You)") by Hundred Percent Free is used up to 609. The second ending theme is Tsukiyo no Itazura no Mahou (月夜の悪戯の魔法?, lit. "Mischievous Magic on the Moonlit Night") by Breakerz is used from episodes 610 to 626. The third ending theme is Pilgrim (ピルグリム, Pirugurimu) by B'z and was used for episodes 627 and 628. The fourth ending theme is "Your Best Friend" by Mai Kuraki from episode 629 to 643. The fifth ending theme is Kanashimi hodo Kyō no Yūhi Kirei dane (悲しみほど 今日の夕陽きれいだね?, lit. "Compared With the Sadness, Today's Sunset Is More Beautiful") by grram beginning on episode 644.
The season aired between February 19, 2011 to February 11, 2012 on Nippon Television Network System in Japan. As of October, 2012, all ten volumes have been released.