今、私の注文はどこですか？

You can check the current location of a purchased product by doing the following:

On the website:

1. Go to My orders.
2. Select the order from the list.
3. Scroll down to the 追跡 section (last one to the left).

On Android/iOS:

1. Go to My orders.
2. Select the order from the list.
3. Tap Package tracking.

The information you see there comes from postal services websites, and usually updates with slight delays.