Boba "Tapioca-juice"

Last Saturday, I have learned that Boba Cafes has become popular in the United States, especially South California through the VOA Special English program. In Japan, people call drinks including boba "Tapioca juice".

I like the Tapioca juice served by "Tea Way" in Kokura station.

I am interested in the story that Asian-American have created a unique culture in the United States, but I feel something different from Japanese in them.