The fourth season premiered in January 2019, and the fifth and most recent season premiered in April and aired for 12 episodes.
The first 12-episode live-action television season aired in January-March 2015, and the second and third 12-episode seasons premiered in January 2016 and April 2017, respectively.
The special is titled “Wakako-zake Special: Hida Sakagura Meguri”.
The manga also inspired a 12-episode series of three-minute anime shorts, starring Miyuki Sawashiro, that premiered in July 2015.