I personally require a better source for such information, in this case, RIKEN or Tsuji himself. To base your claim on a nonconformed statement of a random blogger is naive in my opinion.
I'm basing my claim on the fact that Tsuji's technology is more complex than Tsuji's, requiring a more expensive culture process and more time. Also, I've never known a Japanese person to be a liar, and certainly not to tell such a bald-faced lie as this. 100% Tsuji gave him that estimate, but that doesn't mean they haven't made some improvements in the meantime that will allow them to bring the cost down somewhat. Regardless they will never be as cheap as Stemson.