Why have SCE Japan Studio developed another horse racing sim for PS3?

[BKK2]

makingmusic476 said:

BKK2 said:
So Derby Time Online sold 2,200 first week in Japan.

http://news.vgchartz.com/news.php?id=2547

I really have to wonder why this game was green lighted.

 

It was made by Keoi.

I think the real question is why did Sony decide to be the publisher?

You're confusing it with G1 Jocking and Winning Post. Derby Time is a SCEJ franchise, it has nothing to do with Koei.