Finally I have found Matcha Chocolate in Belgium when I went to visit Brugge and I've been to The chocolate shop Galler.
What is Matcha?! Matcha is finely ground powder of specially grown and processed green tea leaves.(https://en.wikipedia.org/wiki/Matcha). Matcha Chocolate is for someone who like white chocolate . It is combination between sweetness and bitterness .So It is a good news for Matcha fan who is living here now you know!!!
8/10 for the taste
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From @ratchanita