Two-Time Japan Hand Drip Champion's Nitta Coffee Extraction: Flavor Control Through Concentration Gradient and Diffusion Rate

[Two-Time JHDC Champion's Extraction Theory and Practice]This book compiles the extraction insights of Kazuo Nitta, who achieved back-to-back victories in the Japan Hand Drip Championship (JHDC). It addresses common questions that coffee professionals face daily, such as "Why does the flavor change every time despite using the same beans?" and "How can we consistently reproduce ideal flavors in extraction?" These questions are examined through the perspectives of "concentration gradient," "diffusion rate," and "extraction depth."Through these concepts, the book organizes the invisible processes of coffee extraction and attempts to theoretically reframe phenomena that were previously only understood intuitively. The author weaves together perspectives gained from competition experiences and café operations to present approaches that lead not only to knowledge but also to practical improvement in extraction techniques.Book StructureThis book is divided into four parts:【Part 1: Fundamentals of Extraction Theory】Explains the basic mechanisms of coffee extraction and the elements that influence flavor. First, we'll understand "what" changes the flavor, then explore "why" it changes through underlying mechanisms.Chapter 1: Mechanisms of Flavor Change - The Science of Coffee ExtractionChapter 2: The Seven Factors That Change Flavor - Organizing Basic ConceptsChapter 3: Extraction Mechanisms - Invisible Movements Inside Coffee Grounds【Part 2: Extraction Depth and Component Control】Explores the core of extraction, including component dissolution patterns and the influence of time. We'll investigate how coffee components dissolve and how this affects flavor.Chapter 4: Diffusion Rates of Different Components and Influencing FactorsChapter 5: The Influence and Management of Time - Why Drip Methods Are Challenging【Part 3: Practical Extraction Design】Introduces specific recipe development and adjustment methods based on theory. This section explains how to apply theory in actual extraction.Chapter 6: Calculating Coffee and Water Amounts - Extraction Design Based on Brew RatioChapter 7: Building Recipes - Putting Theory into PracticeChapter 8: Flavor Adjustment (Basic) - First StepsChapter 9: Flavor Adjustment (Advanced) - Using Concentration Gradient【Part 4: Adjusting to Different Beans】Shares adjustment methods and examples for various conditions. We'll consider more advanced adjustments based on roast level and bean characteristics.Chapter 10: Adjusting to Beans - Responding to Roast Level and Inside-Outside DifferencesChapter 11: Nitta Coffee's Extraction Recipes - Fusion of Theory and PracticeFinal Chapter: Continuing the Extraction Journey - Finding Your Own "Correct Answer"How to Read This BookExtraction theory may sometimes feel complex, but your understanding will deepen as you gradually follow the concepts. I hope these perspectives will make your daily extractions more enjoyable.Please feel free to incorporate aspects that can enhance your extraction style.Now, let me share Nitta Coffee's approach to extraction.This Book is For:Those who understand extraction basics and want to delve deeperThose who want to theoretically understand the relationship between extraction methods and flavor changesThose with coffee extraction experience but facing challenges with reproducibilityCafé owners and managers who want to provide consistently high-quality coffeeThose considering participation in extraction competitions*Note: This book is intended for readers with basic knowledge and experience in hand drip coffee brewing. Read more