They are metrically compatible with MS Gothic fonts. Attack on Titan 2 - A.O.T.2 - 進撃の巨人2 and Touhou Fuujinroku ~ Mountain of Faith are known to render better with Ume fonts. CW-Bug-Id: #19849 CW-Bug-Id: #19971
From https://github.com/adobe-fonts/source-han-sans/ at e251b7a4fecc7c5bc57d25cb2c2e92a3e8980a39 (2.001). (The repo is too large to reasonably use a submodule.)