Eighth World

Eighth World (stylized as EIGHth WØRlD) is Misia's eighth studio album and her first since signing back with BMG Japan, released on January 9, 2008. It includes the singles "Any Love" and "Royal Chocolate Flush" as well as the J-Wave image song  for Winter Campaign Holy December, Be in Love with J-Wave and "To Be in Love", the theme song to the Japanese release of the movie Bridge to Terabithia. The first pressing of the album was in a sleeve case packaging.

The album is certified gold for shipment of 100,000 copies.

Title
The title, Eighth World, was chosen because of the coincidence of the year of release and the number of the album. Moreover, with the Kanji for eight {八, hachi), resembling a folded fan spreading out, and the symbol for infinity, ∞, being similar to the number 8 turned on its side, the message conveyed in the title is that "an infinite amount of happiness is spreading out in the eighth world of Misia".

Information
With her previous album, Ascension, focusing on the vast theme of "life" and "birth", Misia began production of Eighth World with the idea of incorporating this element in a more tangible way. The album has a more personal theme, with lyrics about relationships and the many scenarios she encountered in her homeland as well as in Kenya, where she visited the Kibera slum in Nairobi. In an interview with MSN Music, she explained, "Last spring, I visited Kenya and the reality of their conditions I saw in the slums was harsher than I had imagined. It made me think over a lot of things. It made me want to sing about "real" issues and with that in mind, one of the first songs I wrote right after was "Any Love"."

"Taiyō no Malaika" was also written during her stay in Africa. A performance of the song was captured in a documentary of her visit. She explained the crowd's reaction, saying, "The words are in Japanese, so naturally, I didn't think they would understand. However, as I sang, I saw the mothers crying as they listened. That's when I realized firsthand that music has no borders and transcends language." The song "Ishin Denshin", which was written by the essayist Mayumi Satō at Misia's request, speaks of this realization.