For me, Japanese green teas tend to be fussy - the water temperature has to be just right, there can't be too much or too little tea in the water, you have to steep it just the right amount of time, you can't let it sit too long once you pour it out. Because of this, I generally stay away from Japanese greens. This one though is an exception - it's that good. It's almost like drinking a full-bodied but mild broth (I've actually used it when cooking seafood dishes - really tasty!). Yes, there's a fair amount of caffeine, but most people won't get jittery from it because the other chemicals in tea even the highs and lows out. If you've got a cram session for school or an intense day of work, you can't go wrong with this tea.