Been drinking imported sencha for 8 years now. Used to even be threads on 4/jp/ about it.
I quit marijuana easier than it. Really fresh high quality sencha brews into a thick green liquor that's buttery, nutty, and grassy. The active alkaloids in the tea plant are strongest in this form, providing an energizing yet relaxing effect.
And I believe it's healthy too. I like drinking it and red wine at the same time.