$412 round trip USA to Cambodia, with a layover in Tokyo

Do you want to fly to Phnom Penh, Cambodia (from which the rest of Asia is at your fingertips for cheeeep) from the East Coast, West Coast, or Chicago, with a free stopover in Japan, for $412-430? OF COURSE YOU DO. You could even visit me in Bangkok for another $110ish! Wow what a deal!