General:

NZ power adaptors/chargers etc. need an adaptor and possibly a voltage converter in Japan. Take a 4-way powerboard with you to make sure all your devices get charged overnight! Check out https://www.power-plugs-sockets.com/nz/japan/ for more information

Make sure you take Panadol, Imodium and Telfast with you. It’s also good to pack toilet paper or wet wipes.