Hello,
I am currently in Japan with exactly this adapter. Unfortunately it is not compatible with the 2-pin sockets, but Japan also has 3-pin sockets, with which it is compatible and thankfully my first hotel also has one. If you have a device that is 3-pin I can recommend the adapter, but if not I would recommend the 2-pin.
According to my research, the connections are identical, but the number in the product name indicates the power of the USB-C port:
AC45PD can charge with 45 W, AC30PD with 30 W. Certain laptops, for example, could be charged with the 45 W version.
Hello.
The 30W and 45W indicate the power at the USB-C port.
For mobile phones, cameras, etc., 30W is sufficient without any problems
If you want to charge a laptop via USB-C, I would recommend 45W.
Just take 45W, it's cheaper anyway ;)