is the fourth single released by singer Maaya Sakamoto

Maaya Sakamoto

is a Japanese singer-songwriter, actress, and voice actress. She made her debut as a voice actress in 1992 as the voice of Chifuru in the anime series Little Twins, but is more well known for her role as Hitomi Kanzaki in the hit anime series The Vision of Escaflowne...

. It was released on April 22, 1998. "Kiseki no Umi" was used as the opening theme for Lodoss Tou Senki: Eiyuu Kishi Den. Although it debuted at #43 in the Oricon

Oricon

, established in 1999, is the holding company at the head of a Japanese corporate group that supplies statistics and information on music and the music industry in Japan. It started as , which was founded by Sōkō Koike in November 1967 and became known for its music charts. Oricon Inc...

 charts, it remained her best-selling single for many years until the release of "Triangler

Triangler (Maaya Sakamoto song)

' is Maaya Sakamoto's sixteenth single. The title track was used as the opening theme for the popular mecha anime Macross Frontier and won the 2008 Animation Kobe award for best theme song...

" in 2008.

Track listing

2. Active heart

Charts

Chart	Peak position	Sales	Time in chart
Oricon Oricon , established in 1999, is the holding company at the head of a Japanese corporate group that supplies statistics and information on music and the music industry in Japan. It started as , which was founded by Sōkō Koike in November 1967 and became known for its music charts. Oricon Inc... Weekly Singles	#43	66,340	12 weeks