What is the cheapest boat from Hakata (Japan) to Buson (South Korea)?

[aaaannddy]

There is the "beetle", but it's about 13000 yen. I'm looking for something in the 5000 - 9000 range. Thanks!

[JOSHUA]

If you're a student you can take the beetle for about 9500 yen discounted one way. I'm assuming this also works if you look like a student, because you can book it online and they didn't ask me any questions about it.

Try looking into the "Camelia Line Ferry". I had some friends take it and the 2nd class is cheaper than the beetle. I'll include a link to information about this company below. Their main website doesn't have English, so I've also included an English information link.

EDIT:
I just checked the site again and if you click the green button in the lower left hand corner. You can select a button for English booking