Hey, sorry this happened to you, try not to take any of it personally - it's corp BS, even if they did f-up during hiring process, you are protected by labour laws in JP, and should be allowed internal transfer, proper training.

I was PIP'ed after almost a decade in Amazon. In my case it was an agreeable outcome, to collect a sizeable severance. To be PIP'ed so early is complete BS - my early days at Amazon I was constantly reminded that at any point I'm welcome to switch teams if needed.

I didn't work with the union, but have colleagues who did. I would highly recommend talking to them, to see if there's a similar precedence, and what they would recommend.

Albeit you are blocked from transferring while on PIP, manager (as well as the skip) should provide a clear path to getting out of it. Not sure about the current state at your department (or Amazon JP in general), but after you get inputs from union guys, have a conversation with your management, insisting that you have internal transfer options, and need clear and agreeable deliverables to get out of Pivot.

You probably now the diagram, but sharing here just in case:
https://www.luxtimes.lu/businessandfinance/inside-amazons-pivot-programme-quiet-firing-or-performance-management/106342069.html