The M+ Outline Fonts Project develops a superfamily set of several families: 4 families with proportional Latin, 3 with fixed-halfwidth Latin, and 2 with fixed-fullwidth Japanese Kana variations.
The Rounded M+ Project develops versions of the M+ Fonts with rounded terminals.
This set, M+ 1p, are fonts with proportional Latin and fixed-fullwidth Japanese, and 7 weights from Thin to Black. The Kana have contrasting straight lines and hand-drawn curves. The Latin is aimed to be a sophisticated and relaxed design.
8,676 glyphs. This is Version 1.061g, released upstream on 2016-04-12, and slightly modified by Google Fonts. Now released under the SIL Open Font License.