She wrote about it an article published in an issue of 正論 (or maybe it was 諸君), which I bought because I wanted to read another article about why 夫婦別姓 would threaten the imperial lineage. Said article did not explain that logic, but Takaichi's was interesting both because she seemed to have actually tried to address many of the day-to-day impediments of having to change one's surnames, but also because the main theme of her article was about why 夫婦別姓 was unnecessary. Not sure how much of the latter aspect was a politically necessary view as opposed to firmly held belief.