Been awhile since this proposed trainset has last been in the news. With the PM's U.S. visit, it looks like this model will be officially offered for the California project. Apparently tender bids by the various manufacturers will occur sometime this year.
Kyodo News report via the Japan Times (yecch...):
http://www.japantimes.co.jp/news/2015/04/25/business/japanese-consortium-to-propose-kawasaki-heavy-bullet-trains-for-high-speed-line-in-california/
...efSET, something like a "super" E7 set?