It's like a mini championship-manager made much simpler, and using the WE/PES engine to show games.
And from the info I've seen it's focuses mainly on the tactical/training aspect, and not much in the "Managing" part.
Well, it wouldn't be that much interesting if it did, since it's limited to the J-League, so almost all the players on it are going to be Japanese anyways...
*FYI the manager of a club usually doesn't have that much of a say on transfers, the exception being the Premiership.
You'd think they do, but that's because CM was made in the UK.
(One of the few unrealities in CM!)
...so it doesn't seem that interesting on paper.
But dunno, afterall it does come from the same team that gave as WE/PES.