You wouldn't see a word at those pages from Japanesse colleagues.
If they were enough strong court wouldn't prosecuted ATCOs at all.
They are not those type of persons. Japan is developed country but their work logic is too far away from modern Europe .
a friend of mine living and working there. You will be shocked if you hear some stories.
He works 11 days on/1 day off. If he has to work on his day off due any reason,than it looks like:
11 days on/1 day on/11days on/1 day off/ 11 days on...
annual leave is 14(fourteen) days. But he is not allowed to use in one part. Two or even three parts are more acceptable. He needs two days for trip (Japan to Europe and back) so guess how many days he could spend...
N.B. top avoid possible missunderstanding he is not working in ATC , but some kind of aviation operations.