Kashyap, who won the Syed Modi Grand Prix Gold in January this year, brushed aside Korea's Lee Hyun Il 21-11 21-13 to set up a match with fourth seed Son Wan Ho of Korea, while Indonesia Masters champion, Prannoy beat Hong Kong's Wong Wing Ki Vincent 21-15 21-17 in another match.
Former world championship bronze medallist pair of Jwala Gutta and Ashwini Ponnappa also got the better of Korean combo of Go Ah Ra and Yoo Hae Won 21-12 21-16 to reach the second round of women's doubles competition.
Gurusaidutt squandered a first-game advantage to go down fighting 21-16 12-21 15-21 to Son Wan Ho, while Line Kjaersfeldt of Denmark outclassed Thulasi 21-16 21-14 in a 35-minute match.
India's mixed doubles combo of Tarun Kona and N Sikki Reddy, too, could not cross the first hurdle, going down 15-21 17-21 to fifth seeds Ko Sung Hyun and Kim Ha Na of Korea.