Low-Caffeine Green Tea | What You Should Know About Tea and Caffeine
Green tea contains over 150 components, but one of the most notable is caffeine.
Like the bitter compound in coffee, caffeine can help ward off sleepiness, sharpen focus and attention, and lift mood. Research also suggests it may support fat burning and exercise performance — giving us a natural boost in daily life.
That said, timing and quantity do require a little care.
Ise Tea Caffeine-Cut Green TeaCaffeine's "half-life" and how to use it wisely
After consuming caffeine, it takes about 5–6 hours for the body to break down half of it (the "half-life"). This means that drinking caffeine late in the afternoon can affect how easily you fall asleep and the quality of your sleep.
Consuming too much over time can also build tolerance, and cutting back suddenly may cause withdrawal symptoms such as fatigue or difficulty concentrating. Caffeine can also slightly inhibit calcium absorption, so pregnant women are advised by WHO guidelines to keep their intake below 200 mg per day (roughly 2–3 cups of coffee).
Formula: C8H10N4O2
Caffeine
Caffeine content guide by beverage
The following are the daily intake guidelines issued by Japan's Food Safety Commission.
| Group | Daily guideline |
|---|---|
| Adults | Up to 400 mg/day |
| Pregnant women | Up to 200 mg/day |
| Children | Up to 2.5 mg/kg body weight/day |
※ Individual tolerance varies; please treat these as general guidelines.
So how much caffeine is actually in the drinks we consume every day?
| Beverage | Caffeine (mg/100 ml) | Notes |
|---|---|---|
| Gyokuro | ~160 mg | Exceptionally high; enjoy in small amounts |
| Espresso | ~60 mg | About 60–75 mg per shot (30 ml) |
| Drip coffee | ~40 mg | About 60 mg per cup (150 ml) |
| Energy drinks | ~30 mg | Varies significantly by product |
| Fukamushi sencha | ~20 mg | Slightly higher than regular green tea |
| Black tea | ~17 mg | Varies with steeping time |
| Green tea (sencha) | ~15 mg | Bancha etc. is lower |
| Hojicha | ~10 mg | Caffeine evaporates during roasting |
| Cola | ~5 mg | Trace amounts in soft drinks |
| Caffeine-cut green tea | ~5 mg | Fujihachi Saryo product (70% off) |
| Barley tea (mugicha) | Nearly 0 mg | Caffeine-free beverage |
Fujihachi Saryo's caffeine-cut green tea
"I want to enjoy tea in the evening, but I don't want to lie awake." "I'm pregnant but I still want real tea flavour." — Our caffeine-cut green tea was born to answer exactly those needs.
Our caffeine-cut green tea uses supercritical carbon dioxide extraction — water and CO2 only, no chemicals.
- First, 85% of the caffeine is removed from the deep-steamed tea.
- To preserve the rich body and smooth umami that can be lost in processing, we then blend in premium deep-steamed tea at a golden ratio.
- The result is a 70%-caffeine-reduced tea that balances great taste with gentle caffeine levels.
About 5 mg of caffeine per 100 ml — the same as cola, and less than one-third of regular green tea. From children to those sensitive to caffeine, everyone can enjoy the aromatic flavour unique to Ise tea with peace of mind.
Frequently Asked Questions
- Q.Is decaf different from completely caffeine-free?
A.Yes. Decaf means the caffeine has been greatly reduced, but not completely removed. Fujihachi Saryo's caffeine-cut green tea is about 70% lower, leaving approximately 5 mg per 100 ml. If you need to avoid caffeine entirely, please choose something like barley tea.
- Q.Is it suitable for pregnant or breastfeeding women?
A.This product contains approximately 5 mg of caffeine per 100 ml, which is less than one-third of regular green tea. If you are pregnant or breastfeeding, please consult your doctor regarding food and beverage intake.
- Q.Can children drink it?
A.The caffeine content is less than one-third of regular green tea. However, appropriate intake varies by age and weight, so please adjust the amount for young children.
- Q.Does it taste different from regular green tea?
A.Because supercritical CO2 extraction selectively removes only caffeine, the original umami and body of the Ise tea are preserved. You can enjoy the same smooth, mellow flavour as our regular deep-steamed tea.
- Q.Can I make cold brew with it?
A.Yes. Simply place teabags in cold water and refrigerate for 30 minutes to 1 hour for a sweet, cold-brew caffeine-cut green tea. It makes a perfect evening cup before bed.
Choosing wisely for every occasion
Caffeine is certainly not something to avoid altogether. It can be a powerful ally when you need to concentrate at work or stay active. The key is to match your choice to the time of day and how you feel. Reach for a bold fukamushi sencha to wake up in the morning — and for a relaxing evening or a family meal, let Fujihachi Saryo's caffeine-cut green tea be your companion.
