Kashyap had reached a career high of World No.6 last year but had been witnessing slump in form for quite sometime now, resulting in his slide in the world rankings.
But the Hyderabadi's impressive performance in last week's Swiss Open, where he reached the semifinals, has helped him to arrest his slide and gain vital points.
Kashyap's compatriot, Kidambi Srikanth, however, has slipped two places to the 2nd spot because of his first round exit at the All England Championships and Swiss Open.
Indian shuttlers, however, did not feature in the top-25 of men's, women's and mixed doubles rankings.