Just because it receives media attention doesn't mean that it's the norm, as the Stanford study authors (one of whom is Korean) establishes:

The project, led by Stanford scholars Gi-Wook Shin and Daniel Sneider, found that less than one percent of Japanese textbooks used provocative and inflammatory language and imagery, but that these few books, printed by just one publisher, received greater media attention. Moreover, the minority viewpoint of nationalism and revisionism gets more media coverage than the prevailing majority narrative of pacifism in Japan.

I read your articles, just wanted to mention that Quora isn't a reputable source. Again, just because a few cases receive media attention does not mean that a majority of textbooks are such -- far from it