ROHM is perceived as one of Hamamatsu's biggest rivals. ROHM is headquartered in Kyoto, Kyōto Prefecture, and was founded in 1958. Like Hamamatsu, ROHM also operates in the Electronic Equipment industry. ROHM generates 228% the revenue of Hamamatsu.

OSRAM is one of Hamamatsu's top competitors. OSRAM is a Private company that was founded in 1919 in Munich, Bavaria. OSRAM operates in the industry. Compared to Hamamatsu, OSRAM has 23,172 more employees.

Et Enterprises has been one of Hamamatsu's top competitors. Et Enterprises was founded in undefined in Sweetwater, Texas. Et Enterprises competes in the field. Et Enterprises generates $ less revenue than Hamamatsu.