Nipponnemertes is a genus of worms belonging to the family Cratenemertidae.

The genus has cosmopolitan distribution.

Species:

• Nipponnemertes africanus (Wheeler, 1940)
• Nipponnemertes arenaria (Ushakov, 1927)
• Nipponnemertes bimaculata Iwata, 1954
• Nipponnemertes danae (Friedrich, 1957)
• Nipponnemertes drepanophoroides (Griffin, 1898)
• Nipponnemertes fernaldi Iwata, 2001
• Nipponnemertes incainca Gonzalez-Cueto, Castro & Quiroga, 2017
• Nipponnemertes madagascarensis (Kirsteuer, 1965)
• Nipponnemertes magnus (Punnett, 1903)
• Nipponnemertes marioni (Hubrecht, 1887)
• Nipponnemertes occidentalis (Coe, 1905)
• Nipponnemertes ogumai (Yamaoka, 1947)
• Nipponnemertes pacificus (Coe, 1905)
• Nipponnemertes pulcher (Johnston, 1837)
• Nipponnemertes pulchra (Johnston, 1837)
• Nipponnemertes punctatula (Coe, 1905)
• Nipponnemertes rubella Coe, 1905
• Nipponnemertes sanguinea Riser, 1998
• Nipponnemertes schollaerti (Wheeler, 1934)
• Nipponnemertes variabilis (Korotkevich, 1983)

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