What makes Tsunami by Southern All Stars notable?

'Tsunami' topped the Oricon charts for several weeks and became one of the best-selling singles in Japan during its release year. Its massive popularity solidified Southern All Stars' status in the J-pop scene and reflected a growing trend of blending rock with traditional pop elements. At the time of 'Tsunami's release in January 2000, Southern All Stars was already a prominent name in Japanese music, having formed in 1974. This album marked their continued evolution as they embraced new sounds while still appealing to their long-time fans, following the success of previous albums like 'Kamikaze' from 1999.