Winter bonuses at Japan's listed companies are likely to show the first year-on-year rise in six years, though by a marginal 0.7 percent, due to the improved business environment, a private think tank forecast Saturday.

The Institute of Labor Administration surveyed companies listed on the First Section of the Tokyo Stock Exchange, finding that 274 have already agreed with their respective labor unions on this year's summer and winter bonuses.

The survey shows the amount of the winter bonuses at those companies averaged 649,818 yen per employee as of Sept. 30, up 4,414 yen from a year earlier.

The total is calculated by adding up each company's average bonus payment per employee, regardless of age or the length of service, and dividing by the number of companies surveyed.