[Snarch]

Hey guys,
I was just offered a teaching position in southwestern Japan. They want me to come over as a tourist and work until my Certificate of Eligibility is ready and then go to Korea to get my visa. Is this standard? Could it be a scam? I willing to go and take a risk but is there anything I should watch out for? Do my credit cards work in Japan in order for me to get out if it falls apart?
Thanks in advance for your help.