Everyone tries to pidgeon hole phenomena like this into their own favorite narratives. Social conservatives will write articles like this. Social liberals will write articles like "Why women aren't getting married anymore" and either blame men for not being good enough to marry, or say that it's a good thing anyway. Those on the economic right will say that stupid millennial lifestyles are preventing people from saving enough to get married, while those on the left will say that lack of jobs and debt from education is to blame.
EDIT: Looks like this story is getting killed in spite of its score. Not complaining, but it's funny that "Why Japanese men won't get married anymore" would probably be on the front page by now.