With experience at Facebook Inc. and Goldman Sachs Group Inc., Akiko Naka's resume at 26 already read like that of a corporate veteran. Then she decided to add entrepreneur to the mix.

Wantedly Inc., the recruiting and social networking platform she started in 2010, now has 600,000 active members who use it to expand their contact list and find jobs. The company has made a profit over the past two years, Naka said in an April 21 interview. With continued growth, an initial public offering may come in four years, she said.

"Going public is not that hard and making pretax profit of several hundreds of million yen isn't difficult either," she said. "The hardest thing for a company is to increase its profit to more than tens of billion yen."