Intrigued by one of the latest internet trends in Tokyo, my friends and I set out for a small shop that serves green tea, or matcha, ice cream coated with matcha powder. Ice cream shops like Nagamine ...

Matcha is having a major moment. People are using this bright-green powder it to make everything from tea, sparkling tonics, and smoothies, to matcha-infused snacks like ice cream and cookies. The hot ...