Japan: there's colour indeed in Iiki no Ki ch.4. ^^ 1 title page and 1 colour page with a new character wearing a cute suit but a tad out of place...

France: on last Monday (Nov. 15) Tonkam launched a site dedicated to Kaori Yuki and her works published in France. The publisher also confirms the release date of NKG 4 on the 5th of January. No news for next books.

Edit 2017 => my own saved version here