Social media such as Twitter and Facebook are mainly used in Japan via personal computers by businessmen in their 30s and 40s and through smartphones by teens and those in their 20s.

According to a survey of 1,080 people ranging from teenagers to those in their 60s, 57.6 percent of the total use social media via PCs and 30.5 percent through smartphones.

People who rely mainly on smartphones for accessing social media tend to use such sites while they are away from home, and they visit the sites more frequently, suggesting companies conducting social media marketing should pay close attention to smartphone users, said advertising agency Hakuhodo DY Holdings Inc., which conducted the survey.

More than 80 percent of those who use social media mainly via smartphones do so on a daily basis, and 44.8 percent have regularly posted comments related to companies, commercial products or services. They post such comments 3.2 times per month on average, compared with 1.9 times for PC users, the survey shows.