In general, anime with a large variety of terms and lines of speech. And terms and lines are difficult. Furthermore, honorifics and difficulty are quite high. As for Nagato and Mikuru, it is difficult for the Japanese to understand because the content they speak is too difficult.
This anime has many unique terms due to its super-unique world view, which makes it difficult even for Japanese people. Even Japanese people feel difficult, so it will be quite difficult for Japanese learners.
Overall, there are classic terms such as “Holy Fire” (Mitamabi) and “Hatsubi” (Tomoebi), so even Japanese people feel somewhat difficult. There are a lot of terms related to the sea, because the sea is the stage. In addition, adult lines will have high-level honorifics and difficult dialects, so you will find it difficult to listen to Japanese.
Although the Japanese level of this anime is advanced, it is not because there are many fantasy terms, but because there are many phrases and idioms peculiar to Japanese (of course there are many terms related to romance, but that is not bad as a material for learning. )
Anyway, the number and lines of the leading role Subaru are very large. Individual characters will not be heard because they speak differently from the present day. It is a very difficult anime for learning Japanese.
You can hear the frank tone of high school students and the Tohoku region dialect. Since the atmosphere of the anime is kind and calm, the conversations you hear in it make peaceful impressions in daily conversations.
It is an anime depicting interaction between humans and youkai. Besides the conversation between high school students, conversations with youkai who speaks in a bit old-fashioned way also appear.
It is a story of human-shaped jewels. The fact that the jewels do not have sex is a point when learning Japanese. Many characters talks in the boy’s tone, however, there are characters who talk in the girl’s tone, such as the diamond.
The main characters use common Japanese in this work. They use a frank and polite way of speaking depending on the scene. Words related to youkai are unique, but slang words do not come out.