If I'm translating correctly, they cost around $800 USD for most models with out shipping. The '10 foot Naoki' model is $1500. When you break it down to parts, that EB 3 pup set cost the manufacturer less than $30, and the bridge less than $15, etc. The Rics are all bolt on necks as are 2 of the 3 higher end models.
Difficult to justify those prices in the world market IMO...An Epi Pro IV with thru neck is less than $500 in the US.