Quentin Griffiths co-founded Asos in 2000 and remained a significant shareholder after leaving the firm five years later.
Rubbish washes up for kilometres along Jomtien Beach, with nails and logs reported, prompting officials to move to clear the shore.
This year's Pattaya International Kite On The Beach event will kick off tomorrow and run daily from noon to 6pm until Sunday.