The best stats I can find for Western sales is that DQ11 sold [800k in two months](http://www.pushsquare.com/news/2018/11/dragon_quest_xi_breaks_4_million_copies_worldwide_but_japan_still_counts_for_at_least_75_percent_of_sales) and for P5 that "[sales numbers for the title in the Asian market are rather considerable](
https://www.playstationlifestyle.net/2019/04/04/persona-5-sales-numbers-2019/#/slide/1)" we don't know exactly what that means, but I'm going to be generous and assume half of its sales were in the West for 1.35 in two years.