Retangle CJK subsets are derived from Noto Sans CJK variable fonts.
Copyright: © 2014–2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.
License: SIL Open Font License 1.1; see NotoSansCJK-OFL.txt.
Upstream: https://github.com/notofonts/noto-cjk
Revision: f8d157532fbfaeda587e826d4cd5b21a49186f7c

The bundled derivatives are renamed Retangle CJK and contain only the glyphs
required by the game's shipped copy, at weights 500 and 600. Source hashes and
reproduction instructions are in tools/cjk_font_sources.json and tools/subset_cjk_fonts.py.