Having something like that between EU and Japan would definitely boost the trade.
Edit: I just checked and the same no customs fees rule applies already to Japan. I wonder if it is going to change at the same time as Chinese products get the customs fees.
https://www.scmp.com/news/china/diplomacy/article/2169144/ch...
If ordering from Amazon.de becomes more convenient is hard to say. I would assume shipping would still be expensive. There are also certain feature of a “common market” that a FTA does not provide, such as the right for consumers to sue companies in their local court, and free returns, etc.
> EU businesses export €58 billion in goods and €28 billion in services to Japan every year. (snip) Japan exports €69 billion in goods and €18 billion in services to the EU annually.
Fortunately, they make highly sought-after electronic products and cars, which can be exchanged for food.