The book is famous for not just listing rules, but for diagramming relationships. It treats Keigo (honorifics) not as random vocabulary, but as a mathematical formula based on:
The ultimate test is the Tadashii Keigo (Correct Keigo) quiz. Look for PDFs that include: shin nihongo keigo training pdf
Final rating (as a keigo training PDF): ★★★☆☆ (3/5)
Excellent for mechanical drills and basic verb transformations, but insufficient for real-world keigo communication. Use it as a supplement to a main textbook or a keigo-specific guide like Nihongo Business Keigo Training. The book is famous for not just listing