A 24-year-old completed a solo round-the-world yacht voyage on Saturday, breaking the record for the youngest Japanese to achieve the feat that was set 30 years ago. Hirotsugu Kimura, a former Maritime Self-Defense Force member, reached his goal off Wakayama Prefecture, western Japan, after 231 days. The challenge to complete the trip without port calls and taking on supplies was his second attempt after one in 2022 was marred by mechanical failure. “I felt it was important to follow through, even though it may not be perfect and things may go wrong,” Kimura said. Marine adventurer Kojiro Shir…