Kyary Pamyu Pamyu and Vocaloid
Sounds like Kyary singing but it is not a human being. It’s a Japanese-made software called “Vocaloid”. For example here is live tune feat. Hatsune Miku “Tell Your World”
“Hatsune Miku” is a representative of the Vocaloid series. In addition, there are Kagamine Rin / Len and Megurine Luka in the Vocaloid. Young producers who were influenced by Yasutaka Nakata are producing songs by Vocaloid actively.
Yasutaka Nakata is creating all the music
Japanese producer named Yasutaka Nakata is creating all the music for Kyari Pmyu Pamyu. He has also arranged Lady Gaga’s song. He has various projects. One of them is Kyary Pamyu Pamyu. The another representative project is a unit called Perfume.
You can watch on Youtube for Perfume songs. (Official Channel)
In addition, he himself is participating in the unit called Capsule.
Hyadain gained popularity through Nico Nico Video
There is a video service called Nico Nico Video, a popular video channel similar to Youtube in Japan. The artists named Hyadain posted personal video there and gained popularity. Sounding like Kyary Pamyu Pamyu, its distinctive loud and pop music gained popularity at once.
Hyadain “Kakakata ☆ Kataomoi-C”
He also provided songs to idol group called Momoiro Clover Z
It also sounds like Kyary Pamyu Pamyu songs.