More than one-third of unmarried adults in their 20s to 40s have never been in a relationship and one-fourth have no intention of ever getting married, a recent survey found. At 34.1 percent, the ratio of single men and women who have never had a romantic relationship was at a record high since Recruit Holdings Co., a staffing service group, began conducting surveys on people’s views on marriage in 2017. The figure of 25.6 percent for people not seeking marriage nearly matches the finding in last year’s gender equality survey by the Japanese government, which has been struggling to deal with t…