Across the nation, roughly 10,000 establishments operate rows of colorful gaming machines often in large, windowless halls that blare loud music and electronic beeps with players given just enough space to sit next to one another to play.
Infection experts have regularly cited them among locations that risk transmitting the virus, along with gyms and bars.
Many parlors have heeded the call to close, with hundreds shutting down after the state of emergency was announced.
But in Osaka, roughly 30 establishments were still open as of last Friday, when Yoshimura began publicly calling them out.
So far he has named nine establishments bucking the call, several of which have now closed their doors.
The governor of the neighboring Hyogo region on Monday also published the names of six pachinko parlors still operating locally.
And in Tokyo, officials pressed on Sunday for 156 locations still open to shut down, with Governor Yuriko Koike saying Tuesday that all parlors in the city were now closed.