Closed Captioning (JP) is a function to display voice/sound as Japanese texts.
This might be helpful for people with hearing impairment or who are in the place can't play the sound.
You can find the supported content from the content search page (Select "Closed Caption" under Sub/Dub in the search page).
To learn how to set Closed Captioning (JP), please refer to this article: How do I set Closed Captioning (JP)?
*You can see which device supports Closed Captioning (JP) from the following article: Which device support Closed Captioning (JP)?
*If you want to choose English subtitles, please turn off Japanese Closed Captioning then select English subtitles.
*Japanese Closed Captioning is offered on limited episodes/titles.