Noto Sans CJK in OTC. The OTC file contains the four fonts for each of Simplified Chinese, Traditional Chinese, Japanese, and Korean but with a smaller amount of space used and more convenient to install. This format works with Mac and Linux.
Multilingual fonts in OTF. These support all four languages in a single font file. However, it requires that the software specifies the language. If no language is specified then by default the language used is Japanese.