I just ran this through a type-identifier that says it's
A- OTF Ryumin Pr5 (H-KL Heavy Bold)
But I haven't a clue where you could find it.
Edited on May 15, 2015 at 15:55 by drf
Here:
https://www.morisawa.co.jp/english/font/ryumin.html
But I had no luck getting it to display latin characters

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