The Japanese company posted net profit of Y460 million for the year ended 31 March, versus a Y129 million loss a year earlier.
Revenue rose to Y29.58 billion from Y28.86 billion, while operating profit increased to Y1.09 billion from Y333 million and pretax profit reached Y1.00 billion.
Earnings per share improved to Y18.87 from a loss per share of Y5.28, with the results prepared under Japanese accounting standards.
With a weak yen and soaring costs, is Japan's booming IT sector heading for an inflation-driven reality check?
Can ITBook's profit surge outpace the looming crisis of Japan's severe 'Digital Cliff' talent shortage?
Is ITBook's turnaround genuine market leadership, or a temporary lift from massive government tech subsidies?