FF VII was released in English with Sony providing a massive marketing budget, to the point that commercials for the game were shown in movie theaters. The game was inescapable and its high quality meant that word of mouth continued the hype after the advertising ceased. That is the reason why FF was so big in America for 20 years, until FF XV damaged the franchise. For DQ the series is steadily growing in popularity year over year and in multiple ways; for example people who are sick of pokemon praise DQM 3 for bringing new sophistication to the monster-taming genre, and people who enjoy 2D RPGs are flocking to the HD-2D remake trilogy in droves.
いや絵が怖いんだよw
単なる文化の違い
今時の日常アニメですら人気あるのに