Quoted from here. Quotes from here. (Same blog, another entry.)
I don't have any real experience in Japanese, so is this potential pun/wordplay credible or made up?
I'm suspicious of this find because I never heard of/read about that before (someone skilled in Japanese would have discovered that, I guess...?) and I can't find any other sources mentioning this.
... Yeah I think whoever wrote that has no idea what they are talking about. I'm no expert at Japanese numeral puns but I know that na is usually 7 (nana) not 9, and ya would be 8 (yattsu) and not 6. Unless the person responsible actually explains how the pun works in English, I'd be skeptical.