The film never got a Blu-ray release in Japan but now one is scheduled for an October 28th, 2016 debut priced at 6,980 yen.
It looks like with all the work that Anime Limited has been doing with their Kickstarter release of Mai Mai Miracle that Avex Pictures is going to take advantage of it.
The set is coming with both English and French dubs, though at the moment the subtitles breakdown is not clear.