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Does Eating Turkey Really Make You Sleepy? And Can Coffee Help?
We’ve all heard it — “Turkey makes you sleepy.” After Thanksgiving dinner, everyone’s on the couch, half-asleep, and the turkey gets all the blame. But is it true? And if it is… can a cup of coffee save the day? 🧠 The Truth About Turkey and Sleepiness Turkey contains an amino acid called tryptophan, which helps your body produce serotonin and melatonin — hormones that regulate mood and sleep. So yes, in theory, tryptophan can make you feel a little drowsy. But here’s the twi
keitaro tsuji
Nov 12 min read


What’s Really Inside Your Coffee: Ingredients and How Brewing Changes Them
Coffee is more than just caffeine — it’s a chemistry lab in a cup. Each sip contains hundreds of natural compounds that affect taste, aroma, and energy. But did you know the amount of each component changes depending on how you brew it? Let’s break it down. Main Components in Coffee (per 100ml, approximate) How Extraction Methods Change the Chemistry 1. Espresso Uses high pressure (9 bar) and short extraction time (~25 sec). Produces strong caffeine concentration, thick body
keitaro tsuji
Oct 272 min read
Why We Love the Taste of Coffee (Even Though It’s Bitter)
If you think about the flavors humans usually enjoy — sweet, salty, umami, maybe a hint of spice — bitterness rarely makes the list. We’re naturally wired to avoid bitter things because, in nature, bitterness can mean poison. So… why do millions of people line up every morning to drink something famously bitter? The Strange Love Story Between Humans and Bitterness The truth is, coffee’s charm isn’t in sweetness — it’s in balance. A good cup of coffee teases your tongue with a
keitaro tsuji
Oct 262 min read
Light Roast Wakes You Up, Dark Roast Fakes You Out
Have you ever stood in front of your coffee stash wondering, “Should I go light or dark today?” Maybe you’ve heard that dark roast packs more punch. After all, it tastes stronger, right? Well… surprise! When it comes to caffeine, your taste buds might be tricking you. 🌞 Light Roast: The Early Bird with Extra Buzz Light roast beans are like morning people — bright, energetic, and maybe a little too perky. Because they’re roasted for a shorter time, light roast beans keep more
keitaro tsuji
Oct 242 min read


The Accidental Buzz: How Coffee Was Discovered
It All Started with Some Very Energetic Goats Long before Starbucks, pour-overs, or espresso shots… there was a goat. Actually, a few goats — really hyper ones. Legend says that around the 9th century in the Ethiopian highlands, a goat herder named Kaldi noticed his goats acting weird. They were dancing, jumping, and refusing to sleep (sounds familiar?). The culprit? Some shiny red berries from a mysterious bush. Kaldi, being curious (and maybe slightly jealous of his goats’
keitaro tsuji
Oct 232 min read
Why Is Coffee Bitter? The Real Reason Behind the Taste
Bitterness in coffee often comes from naturally occurring compounds in the bean, such as caffeine and chlorogenic acids. These are released and transformed during roasting — which means the darker the roast, the more bitter the coffee tends to taste. Still, the roast isn’t the only factor. How you brew your coffee can make a big difference too. Over-Extraction: The Main Cause of Bitter Coffee When hot water spends too much time with coffee grounds, it extracts too many compo
keitaro tsuji
Oct 222 min read
Dark Roast vs. Light Roast: Which One Do People Love More?
When it comes to coffee, everyone has a favorite roast. Some love the bold, smoky punch of a dark roast, while others can’t live without the bright and fruity flavor of a light roast. But which roast is actually more popular? Let’s break it down. What Makes Them Different? Light Roast Roasted for a shorter time Keeps more of the bean’s original flavor and acidity Often described as bright, floral, or fruity Contains slightly more caffeine than darker roasts Dark Roast Roaste
keitaro tsuji
Oct 211 min read
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