Reta and Japan

Hi everyone! Sorry if I’m a bit out of the loop, but I’m wondering if anyone has ever brought their reconstituted Reta (retatrutide) to Japan? I’ll be heading there for a vacation for a few weeks next year, and everything is kept in a single pen.

I’ve heard that the TSA doesn’t really pay much attention to things like peptides, but I’m concerned that Japan might raise questions, given that it’s not exactly “legal” there? I’ve heard of some people not running into any issues, but I’m still not entirely sure. Any help would be greatly appreciated!