Montacutidae W. Clark, 1855
Nipponomysella obesa Habe, 1960
Nipponomysella oblongata (Yokoyama, 1922)
Nipponomysella siliqua (Barnard, 1964)
Nipponomysella subtruncata (Yokoyama, 1927)
Nipponomysella tanabensis Habe, 1960