The recently released song "Unending Scarlet" has stirred a heated debate among music enthusiasts across Japan. Supporters appreciate its innovative approach, lauding the fusion of traditional Japanese elements with contemporary music. However, critics argue it lacks a clear theme and coherence. The controversy has sparked conversations about the broader evolution of Japan's music scene and its popular culture.

Japanese music often straddles between conserving tradition and moving towards modernity. This balance is a critical factor in the reception of new music pieces. Unending Scarlet's controversy reflects this dynamic as it tries to blend traditional and contemporary elements. Also, the fan reactions show the importance of having a strong base theme in Japanese music that connects with the audience easily.

In the US or EU, musical innovation and crossover genres often receive a more positive initial reaction as it is more typical, given the cultures' long history of mixing diverse musical styles. While there is criticism and debate, it is generally understood to be part of the evolving nature of music.