Knowledge
Coffee knowledge and trivia
What Is Specialty Coffee? Definition, the 80-Point Standard, and How to Choose
Specialty coffee refers to a quality concept: 'beans with clear flavor profiles and transparency traceable to origin and process.' This guide covers cupping basics, how to interpret the 80-point benchmark, how terroir and processing methods shape taste, and an approachable home starting point (15g beans / 240ml water / 92°C / approximately 3 minutes).
How to Choose Paper Filters: Bleached vs. Unbleached in Japan
Do white and brown paper filters really change the taste? When alternating between oxygen-bleached white and unbleached brown in a V60 dripper every morning in Japan, the difference is subtle on first sip. However, unbleached filters without pre-rinsing sometimes reveal a faint paper note in the initial aroma.
What Is Decaf Coffee? Processing Methods, Flavor Differences & How to Choose
Want to enjoy coffee in the evening, reduce caffeine during pregnancy or while nursing, but don't want to compromise on taste? This guide walks you through decaf's definition and labeling conventions in Japan, the three main processing methods (water process, supercritical CO₂, and organic solvents), flavor profiles, safety considerations, and how to brew a delicious cup at home.
What Water Temperature for Coffee? The 85–96°C Standard
Just 2–3°C difference in water temperature distinctly changes how acidity, bitterness, sweetness, body, and aroma layer in your cup. If your hand-drip coffee tastes inconsistently sour, bitter, thin, or heavy, starting around 92°C gives you a stable baseline to build adjustments from.
Coffee Basics: Varieties, Caffeine, and How to Brew
Coffee feels complicated because variety, origin, processing, and brewing methods seem separate. This guide connects them in one flow: starting with the difference between Arabica and Robusta, understanding how origin and processing change flavor, and choosing the brewing method that gets you closer to your perfect cup.
What Are Coffee's Health Effects? How Many Cups for Japanese Populations
While coffee's health impact is often debated in black-and-white terms, large-scale studies including Japanese populations reveal that 1–4 cups daily shows consistent favorable associations with all-cause mortality, cardiovascular health, and glucose metabolism. For people who drink coffee regularly or want to know realistic daily amounts and timing for health benefits, practical drinking patterns offer more value than extreme pro-and-con arguments.
How to Choose a Coffee Dripper | Shape and Hole Differences Explained
Many assume dripper flavor depends solely on single versus triple holes—but the real game-changer is shape. Conical, trapezoidal, and flat-bottomed designs alter water flow fundamentally. Layer that with hole diameter, bottom design, ribs, and filter contact, and both extraction speed and flavor profile shift noticeably.
6 Recommended Coffee Certifications | Difficulty Levels & Cost Comparison
When you start researching coffee certifications, you'll encounter many names—J.C.Q.A., SCAJ, SCA CSP, Q Grader—leaving both hobbyists and career-focused learners wondering: 'Which one should I actually choose?'
How Many Cups of Coffee Per Day? 400mg for Healthy Adults, 200mg for Pregnant Women
While people often ask 'how many cups of coffee per day is safe,' the real metric to watch is caffeine content in milligrams (mg), not cup count. For healthy adults in Japan, the safe guideline is 400mg daily and 200mg per serving, while pregnant women should aim for 200mg/day as a more cautious standard, with some guidelines suggesting staying under 300mg.
Coffee Bean Storage: Freezing & Timeline Cheat Sheet for Peak Freshness
It's tempting to assume frozen coffee beans stay fresh indefinitely, but real flavor retention depends on two factors: 'when you'll drink it' and 'how you freeze it.' The basics are simple—room temperature for short-term, refrigeration for medium-term, and freezing for long-term storage. But the timeline shifts based on whether you're storing whole beans or grounds, and whether the bag is opened or sealed.
How to Choose Coffee Beans | Origin, Roast Level & Processing Method
Coffee bean selection becomes easier once you understand that origin alone doesn't determine taste. A bean's character comes into sharp focus when you view origin × roast level × processing method together as a unified system. Even beginners can quickly zero in on their preferences by learning to read these three dimensions.
8 Recommended Coffee Bean Online Retailers in Japan | Selection Guide and Comparison Table
Online coffee beans offer easy access to fresh, high-quality beans with wider selection than typical retail stores. However, with retailers ranging from Kaffee-Ya (with overwhelming inventory) to PostCoffee (with curated recommendations), beginners often struggle with deciding where and what to buy.