While I couldn't provide a direct PDF link, here are some suggestions on where to find a Japanese dictionary of color combinations:
Because the physical copies can sometimes be hard to track down, many enthusiasts search for a to keep these harmonies at their fingertips. In this article, we’ll explore why this book is legendary and how you can use its principles in your own creative work. Who Was Sanzo Wada? japanese dictionary of color combinations pdf link
A Complete Guide to Sanzo Wada’s Japanese Dictionary of Color Combinations While I couldn't provide a direct PDF link,
The most reliable way to get a complete PDF of the book is to purchase an official digital version. Major online retailers like Amazon offer Kindle editions of the book. This supports the creators and ensures you get a high-quality, complete digital copy. A Complete Guide to Sanzo Wada’s Japanese Dictionary
Disclaimer: It is highly recommended to support the creators and publishers by purchasing the official, high-quality paperback or ebook versions (such as those published by Seigensha Art Publishing).