UPDATE: I just found out about a service called "flyonward.com". Apparently, they book a real ticket on your behalf for $10 and cancel it 24 hours later.
Has anyone ever used that service?
I am planning to travel for a few months, starting with Japan then moving on, but I am not sure yet how long I will stay in Japan so I would like to get a one way ticket for maximum flexibility.
What's the cheapest option as "proof of onward travel"?
I have heard about the ferry from FUK to Busan, but the English "JR Beetle" ferry page is badly outdated and only allows internet reservations for 2013/2014, which is of course useless, and the prices I have found on various travel sites (12,000 yen) are pretty expensive for a throw away ticket anyway.
I have also heard about buying a refundable ticket, but I have no idea where to find a fully refundable ticket (a lot of so called "refundable" tickets have significant non-refundable fees).
Getting a round trip ticket and discarding the return ticket would cost for that is about 12,000 yen, which is reasonable but not ideal since it will be wasted.
Does anyone know where I can book a cheap ferry ticket, or is there a cheaper option I haven't considered?