I'm glad I started this topic, this is a very interesting discussion.
Matt also has a really good point there. I know that her English is very basic, she often posts in Japanese on FB as well and I rarely see her using English lately. When she does post in English, she uses no more that two sentences.
Are there any other interviews, perhaps by Japanese magazines, where these questions, or similar ones, where asked? I mean, everyone is credited for the work they did, so it couldn't be a smart move to take credit for work that other people did. Doesn't fit her public persona.