I might be over interpreting your statement, but in case your intention is to apply while you are in Japan, please be aware that that's not possible. The embassy in Japan only accepts Japanese nationals and permanent residents of Japan. 🙃
Given that several people here have expressed a certain unwellness about flying to a far away country with a totally new type of visa, combined with the fact that we've seen issues in Thailand before where IO's didn't know about new regulations properly (just recently, the change to 60 days visa exempt), I can understand that one might ask the question.
added another example of not running into any issues to calm those still in distress. I thought it's a lovely gesture. Certainly more helpful than other posts I've seen here.
For many people here the DTV is a very serious and critical topic that they have to deal with. I'd love for us to show more compassion towards them by not throwing around sarcasm.
Word! Always look at the passport power, that's my approach too. And then choose the one with the highest passport power unless you never intend to travel much and stay only in a certain area where specific passports are more useful than the worldwide best ones. 🙂
There are some exceptions around that. You're allowed dual in some cases.
It's mainly abou becoming German and keeping your previous one, that's no issue any longer as it seems.
The other way around ... not so easy.
But to be honest with you, I didn't dig too deep into that since I wouldn't be eligable for another passport at the moment anyway (digital nomad and no spouse to speak of haha) and I haven't been to Germany in like 8 years or so (hence not up to date on laws anyway) and I don't really need a different / additional one.
But maybe in the future I'll analyse that new law in detail and think about getting the Irish passport as well. But no rush. 🙂