* Born September 9, 1982, in Osaka, Japan
* Japanese singer, songwriter, and actress
* Debuted in 2003 with her single "Momo no Hanabira"
* Has released eight studio albums, three compilation albums, and over 30 singles
* Has won numerous awards, including the Japan Record Award for Best New Artist and the MTV Video Music Award Japan for Best Female Video
* Her music is characterized by its catchy melodies and introspective lyrics
Younha
* Born May 29, 1988, in Seoul, South Korea
* Korean singer-songwriter and actress
* Debuted in 2004 with her single "Audition"
* Has released six studio albums, two compilation albums, and over 20 singles
* Has won numerous awards, including the Mnet Asian Music Award for Best Female Solo Artist and the Seoul Music Award for Best Ballad
* Her music is characterized by its powerful vocals and emotional lyrics
Popularity Comparison
Ai Otsuka and Younha are two of the most popular singers in their respective countries. However, it is difficult to say definitively which one is more popular. Otsuka has been in the industry for longer and has a wider discography. However, Younha has a more international reach and has won awards for her music in multiple countries. Ultimately, it is up to the individual listener to decide which singer they prefer.