The Documentary of HKT48 was announced but, unlike other 48-group documentaries, this one will be directed by a member of HKT48: Sashihara Rino.

Yokoyama Arena was just filled with interesting announcements! First, deadly dinosaur rampage, and now Sasshi will make her official directorial debut, with the Documentary of HKT48. It is scheduled for November, 2015. Here is the official trailer, which was released in November of last year (Japanese only, for now):

This joins a whole bunch of other documentaries which are slated for this year:

• Idol no Namida: Documentary of SKE48
• Kanashimi no Wasurekata: Documentary of Nogizaka46
• Documentary of NMB48
• Documentary of AKB48 (2016)