This feature began with an overview and has traced chinjutsu theory and its close reading, the mechanism of kakari-musubi and its close reading, and the connections to Hashimoto Shinkichi and Tokieda Motoki. To close, let’s grade this more-than-century-old work from today’s vantage point.
What has genuinely held up
The insight that a sentence doesn’t settle what it’s doing until it’s finished being said — the discovery at the core of chinjutsu theory, covered in the plain-language article, is accepted today, unshaken, in Japanese grammatical research. The fact that a sentence-final form governs the function of the whole sentence remains an important starting point in modern syntax and semantics. The term “chinjutsu” itself, as another article showed, is also still alive as basic vocabulary. As for kakari-musubi, the basic skeleton Yamada gave it systematic standing within — the observation that “zo,” “namu,” “ya,” and “ka” tie a sentence to one final form while “koso” ties it to another — is carried forward today, as a matter of course, in classical-language research.
What was rewritten
On the other hand, the framework of German psychology’s “apperception,” which Yamada used to explain the mechanism of chinjutsu itself, has been almost entirely abandoned, in that original form, by linguistics today. As another article showed, Tokieda Motoki directly challenged this explanation — “a static function within the speaker’s mind” — and built an entirely different theory reconceiving language as a “process” arising from the act of speaking and listening. In linguistics today, sentence completeness and modality (the grammatical category expressing a speaker’s mental stance) are more often explained as communicative acts between speaker and listener, rather than through psychological concepts like Yamada’s.
Two legacies within a single scholar
As the previous article showed, Yamada grammar’s own system ceded its place, in schools, to Hashimoto Shinkichi’s more practical bunsetsu theory. But this doesn’t mean Yamada’s work was a failure. What Yamada’s story teaches, instead, is that the value of a discovery itself and the durability of the theoretical tools chosen to explain it deserve to be graded separately. This same lesson has come up, again and again, in this site’s Brugmann feature and Anthony feature.
Summary
| Verdict | Subject |
|---|---|
| Genuinely held up | The insight that endings complete sentences / the term “chinjutsu” / kakari-musubi’s systematic standing |
| Rewritten | The explanation of chinjutsu itself through the framework of German psychology’s apperception |
| The lesson to carry forward | The value of a discovery and the durability of the theory explaining it should be graded separately |
In a nutshell — the insight Yamada Yoshio found, that a sentence isn’t complete until it’s finished being said, is still alive more than a century later. But his own theory of why that’s so has been rewritten, again and again, by the generations that followed.