See Gotenshita court open status. The information is got from undoukai.
pip install gotenshita
% gotenshita -h
usage: gotenshita [-h] [-p] [-t] [court]
positional arguments:
court A to F (default is all), supports multiple select like
'a,f'
optional arguments:
-h, --help show this help message and exit
-p, --show-past show even if past time
-t, --tomorrow show tomorrow's data
See LICENSE.