2012 Busan Open Challenger Tennis – Singles

Dudi Sela was the defending champion but decided not to participate.

Tatsuma Ito won the title defeating John Millman in the final 6–4, 6–3.

This tournament featured the fastest serve ever recorded by Sam Groth at 263.4 km/h (163.4 mph).

Seeds
• # Yen-hsun Lu (first round)

• # 🇯🇵 Tatsuma Ito (champion)

• # Marco Chiudinelli (first round)

• # Rik de Voest (first round)

• # Izak van der Merwe (first round)

• # 🇹🇭 Danai Udomchoke (semifinals)

• # Tsung-hua Yang (semifinals)

• # 🇮🇱 Amir Weintraub (quarterfinals)