The top story in the Nikkei newspaper on May 5th was "Japan Post to consider introducing 7-digit alphanumeric address recognition for deliveries to Rakuten Group and other companies" However, experts have already started to criticize this. Professor Ichiro Sato of the National Institute of Informatics and
Naoki Asakawa, editorial committee member of Nikkei BP, etc.
You're absolutely right. Of course, there are good things about it too...
To begin with, even I was researching the issue of digitizing postal addresses back in 1999 (SRI (Stanford Research Institute) must have been doing it even earlier), and in the process, things like XRI (eXtensible Resource Identifier) came out, and there were issues with privacy properties and identity fraud (APP fraudA lot of issues have been presented, such as the availability of APx (or you could call it APx fraud) (and solutions have also been presented at the same time). I hope Japan Post will make use of these insights.
(References)
Japan Post announces introduction of "digital address" to simplify address entry online: Nikkei Shimbun
https://www.nikkei.com/article/DGXZQOUC261LZ0W5A520C2000000/
17-digit ID for address identification to facilitate smooth logistics, trial in 20 municipalities in December: Nihon Keizai Shimbun
https://www.nikkei.com/article/DGXZQOUA237HM0T21C24A0000000/