Interesting analysis of the distinctiveness of the Japanese Web. The biggest cause in my mind has always been bottleneck effect. Japan's Web developed and remains more isolated than any other "free" nation.
If every non-Japanese website disappeared tomorrow, many Japanese would go literal months without noticing. THAT's why its web is different. sabrinas.space
I also have a sporadic newsletter where I write high-tempo, thought-provoking essays about life, in case that's more your speed:
And if you'd rather give your eyes a rest and your ears a workout, might I suggest my long-form solo podcast, Breaking Change? Odds are, you haven't heard anything quite like it.