Hiroshi Tada (engineer)

He was also well known as a performer of a Japanese style of top spinning known as koma-mawashi.

Although koma-mawashi (駒回し) is traditionally a children's play activity in Japan, Dr. Tada performed this art at an expert level and included in his act elements of juggling, yo-yo and magic, with some comedy thrown in.

He was a regular performer at many festivals in the St. Louis, Missouri area, such as the Missouri Botanical Garden's Japanese Festival, Missouri History Museum's International FunFest, Queeny Park's International Folk Fest, and Tower Grove Park's Festival of Nations.

He graduated from the University of Tokyo and moved to the United States to obtain his PhD.

[2][3] Dr. Tada was an affiliate professor of mechanical engineering at the McKelvey School of Engineering at Washington University in St. Louis[1] and co-author of Stress Analysis of Cracks Handbook.