No. as far as I know.

Depending on the time of day, there are many people working at the station, so the turnover rate is good, so you can always sit if you don't care where you sit.

Basically it is! However, there is a sticker that will be closed at night due to urgent maintenance and cleaning. Even if it is open, there is a limit as it seems that one floor is completely closed and the number of seats available is small.