BABYMETAL's performance at Summer Sonic 2013 marked a significant moment in their early career, as they brought their distinct fusion of J-pop and heavy metal to one of Japan's largest music festivals. With Su-metal, Yuimetal, and Moametal leading the charge, the group captivated the audience with their high-energy performance and unique stage presence. Their set included early hits like "Doki Doki ☆ Morning" and "Ijime, Dame, Zettai," which showcased their blend of catchy pop melodies with intense metal instrumentation. Despite being relatively new to the scene, BABYMETAL's Summer Sonic 2013 appearance solidified their reputation as a rising force in both the Japanese and international music scenes.