Vietnam Airlines from Phnom Penh to Tokyo has 6 flights every day. And there are 42 flights per week flying out of Phnom Penh which connect to Tokyo.
The price for economy class – one way ticket of Vietnam Airlines from Phnom Penh to Tokyo is 13.988.000 VND (or ~$697 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 15.938.000 VND (or ~$795 USD).