It is a management trainee program. I was told that they would assign you tons of work, but compensate you for your effort quite well. You need to be extremely proficient in what you do or you could be on the chopping block.
It is a Japanese company, so you will have to get used to the fact they may not treat you the way that you are familiar with. I'm not saying that it is good or bad, but some may like and many others may not.