Read The 405's Guide to J-pop for more information. It's part of our J-pop week.

Artists hailing from scenes seemingly existing in contrast to Japan's mainstream pop industry have long found ways to squirm in to major-label rosters. One of the most recent performers to pull off such a crossover is Seiko Oomori, who many have dubbed an "anti-idol" and adds noisy elements to otherwise perky music.

According to Ian Martin over at The Guardian, Oomori rose up from the Koenji neighborhood of Tokyo. Known for being the birthplace of punk in Japan's capital, it's an area that attracts a wide variety of artists and many musicians on the "experimental" side of the fence. Oomori started out as a folk singer-songwriter, delivering disjointed stories via her music and wobbly voice. Even as she's gotten more attention, that acoustic element of her sound still pops up, like at this head-scratching performance at the 2013 Tokyo Idol event focused on bubbly, cheery pop songs.

Recently, though, she's incorporated more synthesizers and skip-worthy beats, borrowing the same sonic tools used to construct idol pop. She routinely covers singles from famous groups of young women at her live shows, and has done collaborative concerts with cutesy collectives before. And her original songs often are extremely catchy, and she's gained enough attention to be signed to a major Japanese label and release her albums to a very large audience.

Yet beneath the plastic shell lurks more sinister stuff. The lyrics, for one, are far more twisted than what someone expects from mainstream pop in 2014. But even if a listener doesn't understand a lick of Japanese, Oomori lets the music convey the unease loud and clear too. Weird little noises pop up in her otherwise cheerful pop frequently, and in some cases, lets a galloping techno-pop swing into cacophony midway through.

Oomori follows in a long line of Japanese artists using pop as a way to sneak in more abrasive ideas. As Martin notes, her approach owes a lot to '80s artist Jun Togawa, and she also takes cues from early 2000s star Shiina Ringo. Those two ended up being massive stars still capable of sneaking in subersion...time will tell if Oomori can reach that point, but she's off to a good start.