"IBM Plex Sans CJK" is an open-license font that supports over 100 languages, including Korean and Japanese.

Inspired by the history of 'IBM,' which has served as a mediator between humanity and machines, "IBM Plex Sans CJK" is designed to breathe life into this relationship. Sandoll has produced KR, JP, TC and SC versions to suit the cultures of Korea, Japan and China. 

Use 「IBM Plex Sans」 for free, which can express all East Asian languages, including Korean, Japanes, and both Traditional and Simplified Chinese!