Reproduction steps:
1) Download and open user's attached project
2) Build and run "test.unity" scene on an Android device
3) Notice that characters (regardless of system language) look like Japanese
4) Change system language to ChineseSimplified, ChineseTraditional or Korean
5) Relaunch/Reinstall the application (same result)
-- Notice that even if system language is set to any other than Japanese, those characters still look like Japanese

Note: For reference use "CJK_Characters_on_iOS.png" attached screenshot

Reproduced with:
2018.1.0a7, 2017.3.0f2, 2017.2.1p1, 2017.1.2p4, 5.6.4p4, 5.5.5p2

Reproduced on:
Samsung Galaxy S8, Android 7.0
Google Pixel, Android 8.0
Samsung Galaxy S6, Android 6.0
LG G3, Android 5.0
Meizu MX5, Android 5.0 (this device shows all characters similar to Korean)
LG G2, Android 4.4 (same as Meizu, this device shows all characters similar to Korean)

Unable to reproduce on iOS - tested with iPhone 7 plus, 10.3.2