Dependent visa in Japan: can spouse earn more than main visa holder (within 28h limit)?

About a month ago, I made a post here about a job offer my husband (on a dependent visa) received where he was offered a high hourly rate (~2000 yen) but expected to work essentially full-time. Since that clearly conflicted with the 28-hour limit, we rejected it after the advice here (which was really helpful).

Now the same employer has come back with a counter offer:

  • Strictly within 28 hours/week
  • Same hourly rate (~2000 yen), around 220k+ yen/month
  • IT-related skilled work

For context:

  • I’m a PhD student on a 150,000 yen/month scholarship
  • My husband is on a dependent visa

The confusion now is:

  • One lawyer said a dependent shouldn’t earn more than the main visa holder
  • Other lawyer friends (Japan + international) said there’s no such rule, only 28 hours, taxes, and proper reporting matter
  • They also argued that “earning potential” should be considered , in my case, I could earn ~250k (150k scholarship + ~100k part-time), so under that logic, his income would still be lower

Also:

  • We’ll handle taxes properly and move him to his own health insurance
  • This is temporary ,they plan to switch him to a work visa next month, otherwise we won’t continue

So just wanted to ask:
Has anyone had experience with a dependent earning more than the main visa holder while staying strictly within 28 hours? Any issues with immigration or visa renewal?

Would really appreciate your thoughts.

by Worldly-Throat3089