What makes Shōjo Hikō by Passpo notable?

The single '少女飛行' became a significant hit for Passpo, reaching number 5 on the Oricon charts and contributing to the group's rise in popularity. Its catchy tune and energetic performances helped solidify Passpo’s presence in the competitive J-pop landscape, particularly among idol groups. Released on May 11, 2011, 'Shōjo Hikō' marked Passpo's debut single, establishing them within the J-pop idol scene. At this point in their career, Passpo was just beginning to carve out their identity, having formed in 2009 and gaining attention for their unique travel-themed concept.