Ono qualified for the 2016 PDC World Championship by winning the Japan Qualifying Event. After defeating Alex Tagarao 2–0 in the preliminary round, he lost 3–0 to 16-time world champion Phil Taylor in the first round. Ono made his debut at the World Cup and, together with partner Haruki Muramatsu, they were beaten 5–2 by Northern Ireland in the first round. Ono lost 6–1 in the opening round of the Tokyo Darts Masters to Raymond van Barneveld, but won the Soft Tip Dartslive Premium Stage event by overcoming Boris Krčmar in the final.