Genus Japanolaccophilus Satô, 1972

Type species: Neptosternus niponensis Kamiya, 1939: 32 .

Diagnosis. Moderately large species of Laccophilinae (total length 3.0– 3.2 mm), with the suture between elytron and epipleuron visible dorsally (Figs 3A, D); hind angles of pronotum rounded (Fig. 1); base of pronotum straight or almost so; prosternal process deltoid, not extending beyond mesocoxae and with single posterior tip in middle, not trifid (e.g. with three needle-like tips, like Neptune's fork) (Figs 4, 3C, F).