[Music] Dimished 7ths in Pop

I like how Japanese pop uses diminished 7th to V to bridge to the melody, and I wonder why most music doesn't do this more often. It's really cool and adds depth to the music. I'm sure it also is chordal foreshadowing in the lyrics which I can't possibly understand until I take Japanese. Why does Japanese music uses much more complicated chord structures than American pop? Where did we go wrong? This is food for thought.