HACHIOJI, Japan—The dancers of Shen Yun Performing Arts so impressed Mitsuyama Manami, president of GRIT, that she wished to be a part of them. “Shen Yun is absolutely wonderful! [The dancers’ movements were] beyond the possibility of the human body,” said Ms. Mitsuyama Manami, who is president of a construction and installation company in Tachikawa,…