The draft of the MEXT Roadmap for Large Projects is out and includes Hyper-Kamiokande as an important component of the roadmap!
The Japanese Roadmap Draft is in Japanese and available from:
(it’s the second PDF file or http://search.e-gov.go.jp/servlet/PcmFileDownload?seqNo=0000161877 )
Please look at page 19 of the pdf file, fourth row of the table for Hyper-K.
The Roadmap will be finalised one week from now.