4Gbit (512Mb) would be naff for a DD3. 4Gb was surely intended.
While I do sympathise with Japanese Government for wanting to keep the capability local, it seems futile. What, I wonder, are they hoping will change in the future to make this endeavour, funded with my tax yen and especially my children's debt repayments, eventually profitable? When was there ever a case of the hardware circus setting up permanent shop, rather than just blowing along to the next site of cheap capital?