Walk into any Japanese tea retailer or browse the English tea internet and you’ll find hojicha consistently described as a low-caffeine option — suitable for evenings, for children, for people who love tea but need to sleep. It’s one of the category’s defining selling points. The roasting process, the explanation usually goes, burns off most of the caffeine. What’s left is gentle, mellow, and won’t keep you awake.

The reality is that the story behind hojicha and caffeine is more complicated than that. Roasting does affect caffeine levels — but not primarily in the way most descriptions imply. Understanding what’s actually happening requires separating two distinct reasons hojicha tends to be lower in caffeine, because conflating them leads to some confidently stated things that aren’t quite right.

What People Are Saying

On r/tea, hojicha caffeine threads appear regularly and follow a recognisable pattern. Someone asks whether hojicha is really low in caffeine, replies confirm that yes, roasting reduces caffeine, and a few people note from personal experience that they drink it at night without issue. Occasionally a more sceptical commenter notes they still feel caffeine from hojicha, but these voices are usually outnumbered.

Tea merchant copy leans heavily into the low-caffeine narrative. Descriptions like “gently caffeinated,” “perfect for evenings,” and “naturally lower in caffeine due to the roasting process” are standard across specialty retailers. The Japanese consumer market reinforces this — hojicha-flavoured baby formula products and ready-to-drink hojicha marketed to young children exist in Japan, which has shaped the product’s association with low stimulant content.

Nutrition databases and some food science sources complicate the picture. Third-party caffeine analyses of brewed hojicha show a wide range, from as low as 7–8mg per 240ml cup to as high as 50mg — a range that spans from “effectively negligible” to “comparable to a weak cup of black tea.” That variance points to something more interesting than a simple “roasting burns off caffeine.”

The Research: What Actually Lowers Caffeine in Hojicha

There are two separate mechanisms at play, and they’re not equally important.

The roasting effect — real but modest. Caffeine is a heat-stable compound. It does not break down easily at typical food-processing temperatures. The roasting temperatures used for hojicha — usually around 200°C (392°F) — do cause some caffeine volatilisation and degradation, but the effect is relatively small. Studies on roasted tea processing, including work by Goto et al. on the chemical changes in roasted Japanese green tea, consistently show that roasting-induced caffeine reduction is real but accounts for a relatively modest decrease — perhaps 10–25% — compared to unroasted green tea made from the same starting material.

If roasting were the primary driver of hojicha’s lower caffeine reputation, you’d expect fairly consistent caffeine levels across hojicha products. You don’t get that. The variance in measured caffeine is much wider than what roasting temperature alone explains.

The leaf grade effect — the bigger driver. The more significant variable is which part of the tea plant hojicha is made from. Caffeine in Camellia sinensis is not distributed evenly throughout the plant. Young buds and the newest leaves have the highest caffeine concentrations. Older, more mature leaves contain less. Stems and twigs contain considerably less still.

Traditional hojicha — particularly the style produced in regions like Uji and consumed in Japan as an everyday, inexpensive tea — is typically made from bancha: the late-season harvest of more mature leaves, or from kukicha-style material including stems and stalks. These starting materials have inherently lower caffeine content before a single degree of heat is applied. The roasting then reduces that already-lower caffeine somewhat further.

Contrast this with premium hojicha made from first-flush sencha or gyokuro stems, which has become fashionable in specialty tea markets. These products — where young leaves with high caffeine content are roasted — will produce a noticeably more caffeinated cup than traditional hojicha, even after roasting. Some premium hojicha products available in Western specialty markets are not low-caffeine at all, despite carrying the category’s low-caffeine reputation.

The short version: hojicha made from bancha or kukicha is genuinely lower in caffeine largely because of what it’s made from, not primarily because it was roasted. Hojicha made from premium first-flush material has a more complicated caffeine profile.

The Counterargument: “Low” Is Still Relative

Even if the mechanism is more complicated than the simple “roasting burns off caffeine” story, the net result is often still true — many hojicha products are genuinely lower in caffeine than most other teas a given person might be comparing them to.

Brewed sencha averages roughly 30–50mg caffeine per 240ml cup. Standard matcha around 70mg. Most black teas 40–70mg. A traditionally made hojicha from bancha at the lower end of the range — 10–20mg — is meaningfully lower, even if it’s not zero. For someone who is caffeine-sensitive but not caffeine-intolerant, that difference is practically significant.

The problem is not that hojicha is falsely marketed as lower in caffeine. It often is lower in caffeine. The problem is that the explanation given for why — roasting burns it off — isn’t quite the full picture, and this matters when consumers are making choices based on that explanation. A person who assumes all hojicha is low caffeine because it’s roasted might buy a premium hojicha made from high-grade first-flush material and be confused by the effect.

There’s also individual variability in caffeine metabolism to account for. Two people drinking the same hojicha can have very different experiences, independent of the actual caffeine content, based on genetics that affect how quickly they metabolise caffeine.

What This Means for Tea Drinkers

If you want genuinely low-caffeine hojicha, look at the starting material, not just the product category. Traditional bancha-based hojicha or kukicha-based hojicha tends to deliver on the low-caffeine promise. Specialty or premium hojicha made from sencha or gyokuro — often sold at a higher price point with marketing emphasising the quality of the base leaf — may not.

For practical guidance: hojicha made from bancha, typically dark brown, moderately roasted, and reasonably affordable, is your best bet for an evening cup. Hojicha described as “premium,” “single-origin,” or made from “high-grade sencha” warrants more attention to the specific product details if low caffeine is your goal.

It’s also worth noting that brewing variables affect extraction. More leaf, longer steep, and hotter water all extract more caffeine. The way many people brew hojicha — briefly, with cooler water than a standard green tea steep — may produce a lower-caffeine cup partly because of underextraction rather than because the tea itself is inherently low in caffeine.

Social Media Sentiment

On r/tea, the dominant view is that hojicha is a low-caffeine option and the roasting explanation is accepted without much scrutiny. Occasionally a commenter with food chemistry knowledge pushes back on the roasting mechanism and points to leaf grade as the more important variable, usually generating some discussion. The specialty tea YouTube community (Mei Leaf, Tea DB) has addressed the nuance more carefully — a Tea DB video on hojicha brewing notes the variance between product types. The Japanese consumer market’s framing of hojicha as a children’s tea continues to reinforce the low-caffeine category association regardless of the underlying chemistry.

Last updated: 2026-05

Related Articles

• Does Green Tea Have Less Caffeine Than Black Tea? The Research Says It’s Complicated
• What Shade-Growing Actually Does to a Tea Leaf: The Chemistry Behind Gyokuro and Matcha

Related Glossary Terms

• Hojicha
• Bancha
• Caffeine
• Kukicha
• Roasting

See Also

• Sakubo – Study Japanese

Research

• Goto, T., et al. (1996). Chemical changes in tea components during roasting. Journal of Agricultural and Food Chemistry. — Core reference on the effect of roasting temperatures on caffeine and other compounds in Japanese green tea; establishes that caffeine volatilisation at hojicha roasting temperatures is real but relatively modest.
• Hicks, A. (2009). Current Status and Future Development of Global Tea Production and Tea Products. AU Journal of Technology. — Overview of caffeine distribution across the Camellia sinensis plant and how harvest timing and leaf grade affect caffeine content; establishes the leaf-grade vs. roasting distinction.
• Komes, D., et al. (2010). Green tea preparation and its influence on the content of bioactive compounds. Food Research International. — Data on brewing variables (temperature, time, leaf-to-water ratio) and their effect on caffeine extraction; relevant to the brewing context section.
• USDA FoodData Central — Hojicha tea caffeine — Nutritional database entries showing the wide variance in measured caffeine per serving across hojicha product types.