Part of it comes down to business culture. Japan is a high-context culture. One feature of that is a greater comfort with uncertainty, which extends to timeframes and such. So a Japanese company is going to be more receptive of a development timeline needing an extension and less strict with deadlines. Western companies, on the other hand, are low context and prefer precise time frames, tighter control of deadlines, etc. This isn't the only factor, but it is one. There are obviously far more intricacies to high-context vs low-context cultures, but this is likely the most influential factor in development times.







