Theretra japonica
Diagnostic description:
Abdomen upperside with two obscure dorsal longitudinal lines. Forewing upperside with first and second postmedian lines fused; pale, parallel-sided band present between second and fifth postmedial lines but only slightly paler than the ground colour. Hindwing upperside with indistinct beige medial band.
Male genitalia: Uncus very slender, rounded apically, upperside convex but not subcarinate. Gnathos broad, parallel-sided, apex truncate with rounded angles. Harpe short, broad, hollowed distally, ridges bordering cavity notched. Phallus with narrow, band-like armature; proximal edge of left lobe dentate, right process short, dentate.