Loading…
Loading…
Beginner's Guide
Origin, variety, processing, roast, grind, brewing, flavor.
A gentle, systematic tour of the coffee world.
1 / 7 · Where it grows decides the taste
Key takeaways
Coffee trees only grow in a band called the “Coffee Belt,” between 25°N and 25°S of the equator. Around 70 countries — Ethiopia, Colombia, Brazil, Indonesia and more — are origins.
At high altitude (1,500m+), the large day–night temperature swing makes cherries ripen slowly. Sugars and organic acids concentrate, producing bright acidity and complex flavor. Lowland beans tend to be milder and easy to drink.
African coffees are fruity and floral (Ethiopia, Kenya). South American are balanced and chocolatey (Brazil, Colombia). Central American are delicate and nutty (Guatemala, Costa Rica). Asian have heavy body and earthiness (Indonesia).
Next section
Species & varieties
2 / 7 · Arabica vs. Robusta
Key takeaways
About 60–70% of world coffee production. Known for delicate flavor and rich aroma; specialty coffee is almost all Arabica. It needs high-altitude growing and is disease-prone, so it’s harder to grow and pricier.
About twice the caffeine of Arabica. Strong bitterness and a distinctive earthy flavor. Disease-resistant and grows at low altitude with high yields, so it’s often used in instant coffee and espresso blends.
Flavor differs greatly by variety: Geisha (Panama, floral aromatics), SL28 (Kenya, intense berry acidity), Bourbon (sweet and balanced), Typica (close to original Arabica, delicate).
Next section
Processing methods
3 / 7 · Post-harvest processing changes the cup
Key takeaways
The pulp is removed by machine, then washed and dried evenly. It tends to yield clean, clear flavor where the bean’s terroir stands out. Common in Kenya and Colombia.
The whole cherry is sun-dried. Fruit sweetness and complexity seep into the bean, giving a wine-like, fermented flavor. Common in Ethiopia and Brazil.
Dried with some pulp (mucilage) left on. Flavor sits between washed clarity and natural sweetness; popular in Costa Rica and El Salvador. Classified white/yellow/red/black by how much mucilage remains.
Next section
Roast level
4 / 7 · How it’s roasted changes its character
Key takeaways
Roast comparison
Light roast
Light
Acidity
Bitterness
Body
Floral · fruity · delicate
Medium roast
Medium
Acidity
Bitterness
Body
Nutty · caramel · sweet
Dark roast
Dark
Acidity
Bitterness
Body
Smoky · bitter · rich
A light roast highlights the origin and the bean’s inherent flavor. Bright acidity, floral and fruity aromas, a tea-like clarity. Suits flavorful beans like Ethiopia and Kenya. Higher caffeine.
A good balance of acidity and body, with nutty, caramel and chocolate sweetness emerging. Origin character remains while staying easy to drink. Recommended for many origins like Colombia and Guatemala.
Smoky, strongly bitter, with heavy body. Roast flavor takes the front over origin character. Suits espresso and milk drinks; Indonesian and Brazilian beans are common. Less caffeine than light roast.
Next section
Grinding
5 / 7 · Match the grind size to your brew method
Key takeaways
Grind & brew method
Coffee’s taste is decided by the surface area where grounds meet water and the contact time. Changing the grind greatly changes surface area, so the same bean and brewer can taste dramatically different. Short espresso uses extra-fine; long immersion uses coarse.
Too fine plus a long brew gives bitterness, astringency and harshness (over-extraction). Too coarse plus a short brew gives a thin, sour cup (under-extraction). The basic fix: “too bitter → coarser,” “too sour → finer.”
A hand grinder is affordable and great for beginners. Electric burr grinders (conical or flat) with low unevenness start around ¥10,000. Blade grinders produce uneven particles and aren’t suited to precise brewing.
Next section
Brewing methods
6 / 7 · The same bean, transformed by how you brew
Key takeaways
Pour water gradually to extract carefully. Baseline: water 90–93°C, 15g coffee to 240ml water (1:16). Use a gooseneck kettle and pour in slow circles from center outward for even extraction. Best for enjoying delicate flavor.
High pressure (9 bars) extracts a concentrate in a short time (25–30s). About 18g of coffee yields ~30ml of concentrated espresso. Crema (foam) is one quality indicator. Often dark roast, but light-roast espresso is popular too. The base for latte and cappuccino.
Steep ground coffee in water for 4 minutes. Coffee oils remain, giving a heavy, rich mouthfeel. Without a paper filter, fines may remain. Use a coarse grind and ~93°C water.
The AeroPress brews in about 2 minutes — clean, consistent and handy for travel. Cold brew steeps coarse grounds in water for 8–12 hours, giving a sweet, easy-drinking cup with subdued acidity.
Next section
Enjoying flavor
7 / 7 · Coffee begins before you drink
Key takeaways
Coffee aroma is made of 800+ volatile compounds. Enjoy it in three stages: when grinding (grind aroma), when pouring water (bloom aroma), and before drinking (cup aroma). Notice the difference between aroma through the nose and the retronasal aroma after swallowing.
Coffee acidity isn’t “sour” but a “bright” acidity like wine or fruit. Citric, malic and tartaric acids are involved, and their character changes by origin and processing. Taste the differences — lemon-like acidity in Ethiopia, blackcurrant-like in Kenya.
First smell the aroma while hot, then take a sip. Drink again once it has cooled a little — acidity and sweetness become easier to feel as the temperature drops. Comparing the same bean across origins, processing and roast reveals coffee’s depth.
Quick troubleshooting
Too bitter / astringent
Cause: Grind too fine / brew too long / water too hot
Grind coarser, lower water temp 1–2°C, shorten brew time
Sour / weak
Cause: Grind too coarse / brew too short / water too cool
Grind finer, raise water to 92–94°C, pour slowly
No aroma / stale taste
Cause: Beans long past roast / stored ground for a long time
Use beans within 2–4 weeks of roast, ground right before brewing
Inconsistent every time
Cause: Eyeballing amounts / unstable water temperature
Weigh coffee and water with a scale; control temp with a thermometer kettle
Muddy / powdery
Cause: Fines from filterless brewers / uneven grind
Switch to paper, or upgrade to a more uniform grinder
First Cup
Beans
Start with a fresh single-origin light-to-medium roast — its character is easy to read
Measuring
Weighing coffee and water with a scale makes every cup repeatable
Water temp
Aim for 90–93°C — not straight off the boil, but after it naturally drops when poured between pots
Storage
Store airtight, at room temperature, away from light. Freezing isn’t recommended — condensation forms each time you move it
Freshness
2–4 weeks from the roast date is the sweet spot. Check the date by the bag’s valve
Experiment
Compare the same bean in drip vs. French press to feel how brewing changes taste