Shinkanzen to Nagasaki with hilarous consequences

So in my infinite wisdom of not really checking all the way through with travel plans, I found out that it is going to take 8 hours to get from Tokyo to Nagasaki. I didn't know for sure how long it would take, but I didn't think it would be THAT long. They don't call it the bullet train because it's slow right? Of course, I found out about the time when asking the JR representative, "I'd like a ticket to Nagasaki tomorrow." He sort of laughed, then said better make yourself comfortable on the train - you'll be arriving there at 7:00pm. I didn't ask about any time chance, though I don't think there is any.probably should have checked that out all. No matter, the real fun happens when, in one day mind you, I take the ferry from Pusan to Hakata, then the train all the way back to Tokyo. I'd give it a 50/50 chance that I make it on time. Hilarity will likely ensue.