What makes Hoshi no Kagayaki yo/Natsu wo Matsu Sail no Yō ni by Zard notable?

The album features two tracks that became popular in Japan, reflecting Zard's significant influence on J-Pop. Its release contributed to Zard's legacy, keeping their music alive in the charts and resonating with fans amid Sakai's untimely passing. Released in 2005, this single marked Zard's continued presence in the Japanese pop scene following the death of lead vocalist Izumi Sakai in 2007. It was part of their posthumous releases, showcasing her distinctive vocal style and enduring appeal while introducing new generations to their music.