What makes Fukai Mori by Do As Infinity notable?

The single 'Fukai Mori' became immensely popular, reaching number one on the Oricon charts and solidifying Do As Infinity's status in the J-pop genre. Its inclusion as the theme song for the anime series 'InuYasha' contributed to its cultural significance, exposing the band to a wider audience and influencing the sound of anime music in Japan. Fukai Mori was released as Do As Infinity's fourth single during a period of increasing popularity following their debut album in 1999. By 2001, they had solidified their presence in the J-pop scene, gaining acclaim for their unique blend of rock and pop influences.