"Yume ga Chikara" (夢がチカラ, Dreams Are Strength) is Kokia's 12th single, released on June 23, 2004. It was the lead single from Kokia's fourth studio album Uta ga Chikara, and was used as the official cheering song for the Japan team at the 2004 Summer Olympics.

"Yume ga Chikara" was one of two singles released after Kokia's commercially successful third album, Remember Me. During this stage of her career, Kokia had releases that generally charted in the low end of the top 40.

This song was the second official encouragement song picked by the Japanese Olympic Committee, after "" by Japanese band 19 was used for the 2000 Summer Olympics.

Kokia's involvement with the games was first announced in a press conference on March 3, 2004, along with Akira Senju's involvement as the sound producer. The song took two months for completion, and was officially announced and first performed at a press conference on May 11. The song was often performed or played at official Japanese Olympic events, such as the end of the torch relay, the Japanese Olympic Concert 2004 held on June 20, the unveiling of the official Olympic poster competition, and the farewell party for the Japanese delegation. Both "Yume ga Chikara" and Kokia's studio album Uta ga Chikara were released earlier than the Olympics, with the album being released less than a month earlier, and the single almost two months. Kokia visited the Olympic village during the games, encouraging athletes such as female wrestler Kyoko Hamaguchi, singing the song a cappella and creating a hi no maru flag of encouragement.

Along with official Olympic promotion, Kokia was featured in many music-related and fashion-related magazines in June 2004, such as "CD Data," "Gekkan Piano," "Gekkan Songs," "Weekly Oricon," "What's In?" and "Zappy." "Yume ga Chikara" ringtones were released free of charge to Japanese Vodafone customers between July 1 and September 30. The music video for the song was available for streaming on the Yahoo! Japan top page until August the 30th.

...
Wikipedia