From what I have heard from my (admittedly few) friends there, it hasn't changed much outside of the pure tech sector. The culture of being in the office hasn't changed as much as it has in the US.

Within the tech sector lots of companies went permanent, partial work from home (need to be in the office a couple of days a week or month depending on the company). Some examples:

- 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.

Some non-pure-tech traditional big corp introduces remote work regardless of covid ending (but usually don't allow living far away). They noticed that having big office in Tokyo is expensive.

How can you proof that you are present after hours, if you are only remote employed? Remote work sounds thoroughly uncompatible with Japanese working culture.