Family name Toguchi (Toguchi 
) , throughout the world, is a rare cognomen. The cognomen Toguchi is characteristic of Peru, where it is a rare surname, Japan, where it is a very rare surname, and Singapore. Measured by absolute frequency, it is the most numerous in the United States, Brazil, and Peru.
| shinsei toguchi (b. 1914) |
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| saichi toguchi Japanese candidate (b. 1950) |
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| masafumi toguchi researcher |
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