Dear Mellow Monk,
What does "Okinawan tea" mean? Which tea is more effective to lose weight?
Thanks for your question.
Okinawan tea is simply green tea that's been slightly fermented, like Oolong tea and English tea are. However, since it's fermented, Okinawan green tea actually has less of the green tea polyphenols that are so healthy for you. And as for its weight-loss effects, no one has even produced any evidence that slightly fermented green tea is better than traditional, non-fermented green tea like Mellow Monk's.
I hope this answers your question. Here is a blog posting I wrote on the topic, with links to other postings about green tea and weight loss.
Please let me know if I can answer any other questions.