It was first released on February 26, 2014, in Japan through BMD Fox Records, and was re-released on May 29, 2015 (2015-05-29), in Europe through earMusic, and June 16, 2015 (2015-06-16), in the United States through RED Associated Labels (RAL) and Sony Music Entertainment.

The album managed to peak at number four on the Oricon Weekly Chart, and has since been certified gold with over 100,000 copies sold in Japan.

Two singles from Babymetal, "Ijime, Dame, Zettai" and "Megitsune", gained domestic success, charting within the top ten in Japan.

are notable for their sudden genre shifts, while the Su-metal solo "Rondo of Nightmare" is described as a powerful cacophony.

[17] "Megitsune" is about women who hide their emotions like a kitsune (fox), which serves as the band's signature hand gesture.

tells the story of a girl's first experience at a concert,[21] while "Ijime, Dame, Zettai" is an anti-bullying theme.

[22] According to Nakamoto, the meanings behind lyrics of the songs did not immediately become recognized by the members of the band, but this would later be mitigated after performing the tracks live in concert.

[21] After the album gained international attention, Nakamoto has mentioned how a girl from the United Kingdom sent a letter about how "Ijime, Dame, Zettai" helped her deal with school bullies, and further said, "Despite the fact that we sing in Japanese, so many people around the world have reached out to us and that encourages us to keep doing what we are doing right now.

"[23] On January 25, 2014, the title was confirmed, and the track listing revealed three new songs and ten found on the band's previous singles.

[24] On February 4, 2014, the artwork was revealed for both editions, and a promotional video featuring five songs from the album was posted on YouTube,[25] along with a teaser for a live music clip of "Gimme Chocolate!!".

[26] To commemorate the release day of the album, Tower Records Shinjuku sold "Festival of 25" merchandise, with the store ultimately selling over 1,000 copies.

[29] In mid-2015, the album was re-released worldwide under different record labels with two bonus tracks: the new song "Road of Resistance" and a live performance of "Gimme Chocolate!!"

", although not initially released as a single, brought the band and the album to international success; the song peaked at number 5 on the Billboard World Digital Songs chart in the United States and its live music video performance at the concert Legend "1997" Su-metal Seitansai has garnered over 100 million views as of July 4, 2019.

But those who don't really care about rules and just want to jump around like idiots to the brightest, silliest music imaginable will find exactly what they never dreamed about asking for in Babymetal's brilliant debut.

"[1] Sarah O'Connor from Rock Sound wrote that the album was "oodles of fun" and "completely and utterly absurd, but when has that ever been a bad thing?

[42] Tristan Peterson from Metal Obsession stated, "This band was created for the demographic of “Music that your Japanese Boyfriend/Girlfriend, who doesn’t really like Metal, would enjoy.” He continued saying, "This is a unique album from a unique band that has not compromised on their intent, and that is to create a charming, and pretty damn heavy, dichotomy of sound for you to enjoy.

[41] In December 2014, Babymetal was certified Gold by the Recording Industry Association of Japan for more than 100,000 physical copies shipped to stores.