You will probably arrive in T1. After clearing customs and entering the arrival hall (ground floor), turn right and keep walking. You will start to see signs indicating escalators going back up to the departure level. Underneath the escalators, against the wall, is a bank of ATMs which accept Plus and Cirrus cards (look on the back of your ATM card for the symbol). Make sure you remember your PIN, and not just the pattern your fingers trace out on the keypad, as the Japanese keypads are inverted on most ATMs (same as numeric entry keypads on computers; US ATMs use telephone-style layouts).