Board Thread:Questions and Answers/@comment-25314828-20141116152231/@comment-6697950-20150503061000

The coversion rate is 100 credits per yen. So, to get 300,000 credits, you need 3,000 yen or around 30 dollars. But remember that most players don't have a job, so only rich kids like Shouichi wouldn't have a problem getting the money for high-level items.