Masuzo Shikata (?? ??, Shikata Masuzo, Tokyo, August 10, 1895 – May 8, 1964) was a Japanese chemist and one of the pioneers in electrochemistry.
Together with his mentor and colleague, Czech chemist and inventor Jaroslav Heyrovský, he developed the first polarograph, a type of electrochemical analyzing machine, and co-authored the paper which introduced the machine and the name "polarograph".
This machine was important because it automated the measurement of I-V curves (current-voltage curves) of solutions, which when done by hand could take over an hour for each test.