Which plug from the Apple World Travel Adapter Kit is for Japan

Hi, I’m travelling from Australia to Japan in a few months. I’m trying to figure out which of the Apple Travel Adapter Kit suits Japanese outlets. I’ve got it narrowed down to the plug marked CHN (two straight pins with no holes) or the plug marked USA (two strait pins with holes). Any help/recommendations? I’ll be using the plug with the Apple 35w double usb-c brick. Thanks!