Does Japanese Green Tea Have More Caffeine? A Guide to Brewing and Varieties
                                
                                
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                                    4 min read                                
                            
                                According to Mayo Clinic, a typical 8-ounce cup of green tea contains between 20 and 45 milligrams of caffeine, which is significantly less than coffee. However, the notion that all Japanese green tea has low caffeine is a common misconception, as the actual amount varies dramatically depending on the specific tea type, cultivation methods, and brewing process.