Rain's World

Rain's World is the fourth Korean-language studio album by South Korean recording artist Rain. It was released on October 14, 2006, through JYP Entertainment. Building on the success of its predecessor, the album further established him as one of the top musical acts in Southeast Asia. A repackaged edition of the album was released on December 22, 2006.

Commercially, the album peaked at number one on the Korean monthly album chart issue for October 2006, becoming Rain's first monthly number-one album. It was the ninth best-selling album of the year in South Korea, selling over 106,000 copies. In 2007, it was named one of the Best Japanese & Korean Releases at the IFPI Hong Kong Sales Awards.

Background and release
Rain's World was released through JYP Entertainment and Warner Music Asia on October 14, 2006. Three singles were promoted for the album: "I'm Coming" (featuring Tablo), "In My Bed", and "With U". Media outlets noted that the single "I'm Coming" "was created after hundreds of revisions over two years".

A repackage of the album was released in two versions: A type (CD+DVD Set) and B Type (CD+DVD+Diary Set). CD contains remixed 'Bad Guy', 'I'm Coming', 'I' And 'With U' added to films of 4th album recording, jacket picture shooting session, a music video taping. B Type re-pack, which was limited to 5,000 copies, was a seasonal item for the Fall of the year with a high quality diary that has Rain's pictures undisclosed to the public.

Reception
Commercially, the album debuted at number one on the MIAK monthly album chart in October 2006, his first number-one album on the chart. It sold 108,179 copies in South Korea by January 2007. In Taiwan, the album peaked at number seven on the G-Music Combo Albums chart and number one on the East Asian Albums chart. Although Rain did not win any music program awards in South Korea while promoting the album, he won Best Male Artist at the 2006 Mnet KM Music Festival for "I'm Coming" and Best Japanese & Korean Release at the IFPI Hong Kong Sales Awards in 2007.

Promotion and live performances
To promote the release, Rain embarked on the Rain's Coming World Tour. The tour started in Seoul and included stops in the US, Japan, China, Singapore, and more. The opening show of the tour was a free concert held the day prior to the release of Rain's World at the Seoul Olympic Stadium, which attracting 40,000 people. His concert at the Tokyo Dome on May 25, 2007, attracted nearly 40,000 people and marked the first time a Korean artist performed at the Tokyo Dome. The tour attracted over 280,000 people in total.