Hiroto Kyoguchi continued the stellar start to his career on Sunday, surviving a war against Jose Argumedo to win his first world title just over one year after turning professional.

The 23-year-old Kyoguchi became a champion in a Japanese record of 1 year and 3 months, while improving his unbeaten streak to eight with six knockouts. Argumedo fell to just his fourth loss in 25 bouts, but both will be proud of their effort in a wild encounter.

“The fastest to the title and what not, that doesn’t mean much to me,” said Kyoguchi, the new IBF minimumweight champion. “I’m just thrilled to be a champion. I’ll keep working to become even stronger. I’m not close to being satisfied.”