but if Japanese developers are brilliant it doesn't make sense that there hasn't been wide success outside Japan like American software has.

I also used to think it was a cultural issue but I realized that consumer adoption cannot come without risk takers and also a prioritization from the government mainly the MIC which Japan lacks.

You really can't minimize the impact America's MIC had on software adoption the same way Japanese CCTV surveillance equipments were allowed to proliferate in China (it wasn't purely for profits to give you a hint).