Ito En Oi Ocha green tea has more caffeine than Arizona Green Tea on both counts: 60mg per 16.9 oz bottle against 7.5mg per 8 oz serving (23 oz can holds ~21.5mg), and about 4mg per fluid ounce against 1. The serving sizes differ, so the table below shows both ways of counting.
Ito En Oi Ocha green tea vs Arizona Green Tea: the numbers
| Ito En Oi Ocha green tea | Arizona Green Tea | |
|---|---|---|
| Caffeine per serving | 60mg per 16.9 oz bottle | 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) |
| Caffeine per fl oz | 3.6mg | 0.9mg |
| Servings to reach 400mg (FDA context) | 6.7 | 53.3 |
Sources: Ito En Oi Ocha green tea's figure is verified in our Ito En Oi Ocha green tea caffeine guide against Caffeine Informer (source); Arizona Green Tea's figure is verified in our Arizona Green Tea guide against Arizona published figure / Caffeine Informer (source).
The concentration gap is the striking part: Ito En Oi Ocha green tea packs roughly 4 times the caffeine per ounce. Sipping speed matters at that density; a 16.9 oz bottle finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Arizona Green Tea when you want the lighter dose or a slower ramp, and Ito En Oi Ocha green tea when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- Ito En Oi Ocha green tea: the full caffeine guide
- Arizona Green Tea: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does Ito En Oi Ocha green tea or Arizona Green Tea have more caffeine? Ito En Oi Ocha green tea: 60mg per 16.9 oz bottle versus 7.5mg per 8 oz serving (23 oz can holds ~21.5mg) for Arizona Green Tea.
Which is stronger per ounce? Ito En Oi Ocha green tea, at about 3.6mg per fluid ounce versus 0.9mg for Arizona Green Tea.
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