He carried a stock of medicine from San Francisco, he said, but only used eye drops and band-aids during his more than two months alone at sea.
"That shows how healthy I am," Horie said. "I'm still in the middle of my youth."
He said he "burned all my body and soul" on the journey but says he's ready for more.
"I will keep up my work to be a late bloomer," he said.
It was the latest record-setting achievement for the octogenarian adventurer, who in 1962 became the first person in the world to successfully complete a solo nonstop voyage across the Pacific from Japan to San Francisco.
Sixty years later, he traveled the opposite route.
Soon after his departure from San Francisco, he was faced with a storm, but the weather gradually improved and he reached Hawaii in mid-April ahead of schedule.
He had some struggles toward the end with a few days of pushback from a strong tide. He wrote on his blog on Friday that he had succeeded but was exhausted, and he took a nap after feeling assured that his yacht was on the right track to the finish line.
Horie has completed other long-distance solo voyages, including sailing around the world in 1974. His latest expedition was the first since his 2008 solo nonstop voyage on a wave-powered boat from Hawaii to the Kii Strait.