Looks like after a long break the manga will resume.
" The author/mangaka Azuma Kiyohiko-san is taking an extremely long extended break away from writing and drawing to focus on things not directly related with work. Last year, he had been working on finishing the annual Yotsubato! related content such as art for merchandise (e.g. the 2014 calendar), while this year he is and perhaps remains attending various conventions (some that have cosplay), autograph sessions and more at different cities. Not too long ago, he was also potentially looking to hire an assistant, but he doesn’t seem to have found someone to his expectations."
Recently ch 86 was released, the first chapter in a little less than a year and a half or so.
It would be great if the mangaka was able to continue producing more chapters to this wonderful series!