The reverse might work - offering companies big incentives to move from Tokyo to the declining areas (and take some of their employees with them). After all, one of the primary reasons people flock to the big cities is because of the availability of work.
It's gotta be intended to push people who are on the fence over to the "move" side, not to get people who've not been considering it to decide to move.
- Office downsized to only hold 30% of staff, and you can work from home as little or as much as you want.
- Need to come a few consecutive days per month, travel expenses from anywhere in Japan (within reason) are reimbursed.
I also know a handful of people in non-tech (but not what I would call salaryman/desk jockey jobs) that went to 75% or more work from home.
I’m grasping at straws here.