Emiii - Hello ( ´∀｀) I believe they will be available in stores 9/13 but they haven’t announced the online release date yet ( p_q). With most special releases in the past, they did the online release the previous night at around 21:00 Japan time. 。(⌒∇⌒。) So if it follows that pattern, the this Yui Kanno collar will be available around ( ^_^)／ 9/12 at 21:00. However, as always, the best way to stay informed is to sign up for the Tokyo Kawaii Life emails! 〜(￣▽￣〜)
Emiii - Hello! ( ´ ▽ ` )ﾉ Sorry I don’t personally know this information (besides what’s shown here but I don’t think that’s exactly what you’re asking for), but perhaps you can ask them yourself if you really want to know (^～^)?
Minami’s twitter is @liznanchan and Manaka’s is @Manachan1 (*^▽^*).