The article is an Encyclopaedia entry about a specific thing. It's not an article about the general issues around retirements in Japan. it's about this one spec

The article is an Encyclopaedia entry about a specific thing. It's not an article about the general issues around retirements in Japan. it's about this one specific syndrome. It is not reasonable for it to discuss different topics that might have different causes, effects, etc. If you wanted to raise that issue here that's fine, it's arguably on topic here to ask if there's a complementary syndrome affecting husbands and what that is and to discuss issues around it. That's fine, but this isn't an appropriate criticism of the article.