Sansei visa: travel, and residence requirements

Hi everyone,
I just got my Certificate of Eligibility and I’m applying for a Sansei (long-term/permanent resident) visa. I need to enter Japan by November, but I have a few questions and I’m hoping someone here has experience:

  • I have a dog and just started her quarantine process to bring her with me.
  • I’m also in the middle of a medical treatment that I may need to continue outside Japan.
  • I work remotely (digital nomad style), so my plan is to be based in Japan but also travel around.

What I’ve heard is that it’s not advised to leave Japan too often, because immigration might not renew my visa, or in some cases they could even cancel my zairyū card on the spot if they think I'm not really living there.

So my questions are:

  1. After I first enter Japan with my CoE, do I need to stay there for a minimum period before I can leave again (I'm planning to use a family member's address to register in a prefecture there)?
  2. Is it really a big problem if I travel internationally a lot while holding this visa?
  3. Is there any way around this (like a multiple re-entry permit, or some other documentation)?

Basically, I need to figure out how strict immigration is about actual residence, since I’ll be juggling my dog’s process + my medical treatment + remote work.

Any advice or personal experiences would be super helpful 🙏

by SongFriendly6416