"We'll boost our aviation crew by bringing in 60 more members," the spokesman told AFP.
The move comes after Japan spotted a Chinese nuclear-powered submarine in disputed waters early this year.
The uninhabited islets are at the centre of a festering row between Tokyo and Beijing, which is also involved in a widening dispute with several Southeast Asian countries over islands in the South China Sea.
Relations between Japan and China deteriorated in 2012 when Tokyo "nationalised" some of the islets.
Since then, the two top Asian economies have taken gradual steps to mend fences but relations remain tense.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)