Mashin Hero Wataru is a comedy/adventure Super Robot multimedia franchise originally consisting of 45 episode anime series created by Sunrise first aired on April 15, 1988. Sunrise credited "Hajime Yatate" for the storyline and Shuji Iuchi directed the series. The series employs a kinetic visual gag style, often employing characters running with their feet over their shoulders derived from Sunrise's previous Super Robot anime series Choriki Robo Galatt.

Two sisters move to the country with their father in order to be closer to their hospitalized mother, and discover the surrounding trees are inhabited by Totoros, magical spirits of the forest. When the youngest runs away from home, the older sister seeks help from the spirits to find her.

Serial murders involving all kinds have happened. All the victims are from a Music School led by a famous pianist. Conan and company have been invited to a opening concert of the Music Hall built by the pianist. The biggest attraction of this concert is the world famous violin called "Stradivarius" and a special appearance of a singer who has perfect pitch.