Oh, there finally is a thread for this. Well, here's the staff:
Original Creator: Satsuki Yoshino
Director: Masaki Tachibana
Series Composition/Script: Pierre Sugiura
Character Design: Majiro
Art Director: Hiroshi Kato
Photography Director: Yu Wakabayashi
Colour Setting: Hiromi Miyawaki
Music: Kenji Kawai
Sound Director: Kazuhiro Wakabayashi
Sound Effects: Eiko Morikawa (Chura Sound)
Calligraphy: Ungai Hara
Animation Production: Kinema Citrus
Website:
http://barakamon.jp/staff/
The key visual on the website was illustrated by Nisan Yamamoto, who serves as a background artist on the staff.
Seishu Handa is voiced by Daisuke Ono. I'm not very fond of this choice as he makes him sound a lot older than he is.