What makes Rain by Sekai no Owari notable?

'Rain' achieved significant commercial success in Japan, topping the Oricon charts and solidifying Sekai no Owari's status as leading figures in J-pop. The album's unique fusion of styles attracted international attention, influencing the indie pop landscape within and beyond Japan. By the release of 'Rain' in July 2017, Sekai no Owari had already established themselves in Japan's music scene with their earlier albums, notably 'Tree' from 2015. This album marked a continued evolution of their sound, showcasing a more polished production and deeper lyrical themes, following their rise to fame after selling out major venues.