Suetsugu represented Japan at the 2008 Summer Olympics in Beijing. He competed at the 4×100 metres relay together with Naoki Tsukahara, Shinji Takahira and Nobuharu Asahara. In their qualification heat they placed second in behind Trinidad and Tobago, but in front of the Netherlands and Brazil. Their time of 38.52 was the third fastest out of sixteen participating nations in the first round and they qualified for the final. There they sprinted to a time of 38.15 seconds, the third time after the Jamaican and Trinidad teams, winning the bronze medal. He also took part in the 200 metres individual, finishing sixth in his first round heat, with a time of 20.93 seconds, which was not enough to qualify for the second round.