Prince Mackaroo, known in Japan as Ojarumaru, is a Japanese manga series created by Rin Inumaru and published by Shogakukan and serialized in Ciao in 1993. The manga was republished by Shueisha and re-serialized in Saikyo Jump in 2011. It was adapted as an ongoing anime series produced by Gallop and broadcast on NHK beginning in October 1998. As of today, The show has become the second longest-running anime on NHK next to Nintama Rantaro. The title character was originally voiced by Hiroko Konishi, but is now performed by Chinami Nishimura since 2001. The opening theme is performed by Saburō Kitajima and the ending theme is performed by the characters. The story focuses on the adventures of a 5-year-old Heian-era prince with a weakness for creme caramel. It also features his pet firefly, and a trio of young oni. Since April 2, 2007 the show has been broadcast in High-definition. On April 10, 2009 the show had aired 1000 episodes. The show has now been dubbed in Spanish, Italian, Arabic, Chinese, Hindi, Tagalog and Thai.
It received an "Excellence Award" for animation at the 1999 Japan Media Arts Festival.