Nearly 2 in 3 single men in their 30s who had never been married have not been in a relationship they thought might lead to getting hitched, a recent online poll showed.

In the survey conducted by the Meiji Yasuda Institute of Life and Wellness, 62.7 percent of male respondents and 39.4 percent of female respondents aged between 25 and 34 said they have never been in such relationships.

"While it is still the dominant way of thinking that males should approach females first, many men are passive in terms of romantic relationships. As a result, they have trouble starting serious relationships that lead to marriage," the survey found.