Below is a short and simple instruction on how to obtain Polygon from Japan on the Changelly website:
Please be aware that this may take from a few minutes up to a couple of hours for Polygon to arrive into your crypto wallet. We undertake to transfer your MATIC as prompt as possible, but from time to time there are delays because of the following reasons:
- Overload of the blockchain;
- Updates of cryptocurrency;
- DDoS attacks.
Voila! Your MATIC will be transferred to your wallet asap.