What is the difference between the melody of Japanese songs and other music?

First of all, the style is changeable (you can call him eccentric if you don't like it). The Japanese nation is a reformist nation and lacks originality. This is true from science and technology to culture, so almost no songs popular in Japan are pure in a certain style, and most of them are a hodgepodge, plus ethnic patterns.

Secondly, the popular arrangement in Japan is exquisite, and his harmony connection is exquisite, especially BASSLINE, which feels that many songs are supported by bass. Bass is dominated by 2 degrees, and 5 degrees is rarely used, so chords often transpose.

Third, it is often, it should be said, always tone sandhi, especially the frequent tone sandhi with the same name, which is a western trend.

Rarely seen in carpe diem.