This problem has recurred in Lubuntu 16.04 ISO. Currently Japanese can not be displayed in the live launch of the ISO.
Package fonts-noto-cjk on behalf of the package fonts-droid has been adopted.
https://code.launchpad.net/~gunnarhj/ubuntu-seeds/lubuntu.xenial_chinese-fonts/+merge/288194
but, fonts-noto-cjk does not take into account the Japanese.
This problem has recurred in Lubuntu 16.04 ISO.
Currently Japanese can not be displayed in the live launch of the ISO.
Package fonts-noto-cjk on behalf of the package fonts-droid has been adopted.
https:/ /code.launchpad .net/~gunnarhj/ ubuntu- seeds/lubuntu. xenial_ chinese- fonts/+ merge/288194
but, fonts-noto-cjk does not take into account the Japanese.