Dianthus japonicus

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Dianthus japonicus Flower Pair 2300px.jpg

|genus = Dianthus

|species = japonicus

|authority = Thunb.

}}

Dianthus japonicus, known as seashore pink,{{Cite book|url=http://www.forest.go.kr/kna/special/download/English_Names_for_Korean_Native_Plants.pdf|title=English Names for Korean Native Plants|publisher=Korea National Arboretum|year=2015|isbn=978-89-97450-98-5|location=Pocheon|pages=440|access-date=4 January 2017|via=Korea Forest Service}} is a species of herbaceous perennial plant in the genus Dianthus.