Yamada Yoshio’s thinking doesn’t stop at the single massive work this feature has read. Two threads run through it: the path by which a term he coined survived to this day, and the somewhat different fate of his own theoretical system.
The word “chinjutsu” is still in active use
The term “chinjutsu,” covered in the plain-language article, is one of the most widely established of all the technical terms Yamada coined. In Japanese grammatical research today, when discussing the function a sentence’s predicate performs — asserting a fact, making a judgment, addressing the listener — the word “chinjutsu” is still used as a matter of course. Its actual content, however, has been continuously debated and rewritten by later researchers.
A challenge from within, by Tokieda Motoki
Tokieda Motoki, covered elsewhere in this feature set, valued Yamada’s concept of chinjutsu highly, while directly challenging his explanation of how it works. Yamada explained the apperception that unifies a thought as a static function residing within the speaker’s mind. Tokieda, years later, built his own theory that reconceives language itself as a “process” that arises, moment by moment, out of the act of speaking and listening. Using the same word, “chinjutsu,” a dispute over its actual content was carried forward, long past Yamada’s own generation.
What’s taught in schools isn’t Yamada grammar
There’s a less widely known fact on the other side of this story. The Japanese grammar taught in schools today — the one that reads sentences by breaking them into “bunsetsu” units — is not, in fact, Yamada grammar. It’s an entirely separate system, established by Hashimoto Shinkichi, covered next in this feature set. Where Yamada’s theory centered on somewhat philosophical and psychological concepts like apperception and chinjutsu, Hashimoto’s bunsetsu theory centered on something more objective and easier to apply: breaks in pronunciation. In the classroom, it was Hashimoto’s system that was adopted.
There’s a certain irony here. Yamada built his own system only after thoroughly critiquing every piece of prior Edo-period scholarship. But that system itself was, in turn, displaced by the next generation’s more practical one. The term (chinjutsu) survived; the system (Yamada grammar itself) was replaced by the next generation’s — a pattern that closely echoes the stories of many other scholars already covered in this feature set.
Summary
| Connection | Detail |
|---|---|
| What survived | The term “chinjutsu” — still basic vocabulary in Japanese grammatical study today |
| A challenge from within | Tokieda Motoki built his own theory, disputing the actual content of the same term |
| What ceded its place | School grammar’s place went to Hashimoto Shinkichi’s bunsetsu theory, not Yamada grammar |
In a nutshell — the word “chinjutsu,” which Yamada forged, survived. But the system he built around it ceded its place to a more practical system from the next generation.