What share of managers are women at Kaisei Kogyo Co., Ltd.?

13.3%, as reported to MHLW's women's-advancement database (as of March 2026).

What is the gender pay gap at Kaisei Kogyo Co., Ltd.?

Women's average pay as a percentage of men's: 76.4% across all employees, 76.4% among regular employees. This compares average pay, not pay for the same job.

How much overtime do employees at Kaisei Kogyo Co., Ltd. work, and how much paid leave do they take?

Average overtime is 15.9 hours a month (median for the same industry and size: 16.0 hours), as reported to MHLW's women's-advancement database.

← Construction in Kumamoto

Construction·Kumamoto·101–300 employees

Kaisei Kogyo Co., Ltd.

Japanese name: 開成工業株式会社 · English rendering · Corporate number 7330001010454 · 日本語

Kaisei Kogyo Co., Ltd. (開成工業株式会社), a construction employer in Kumamoto with 101–300 employees, reports in the Ministry of Health, Labour and Welfare's women's-advancement database that 13.3% of its managers are women, women's average pay is 76.4% of men's among regular employees (as of March 2026).

Women's advancement and leave

Women in management

13.3%

Median, same industry and size: 4.0%

Women's pay as % of men's, all

76.4%

Median, same industry and size: 70.0%

Women's pay as % of men's, regular

76.4%

Median, same industry and size: 71.8%

Women's pay as % of men's, non-regular

Not published

Median, same industry and size: 63.6%

Men taking childcare leave

Not published

Eruboshi (level 3)

The pay figures compare women's average pay with men's, not pay for the same job. Data as of March 2026.

Working hours and retention

Average monthly overtime

15.9 hrs

Median, same industry and size: 16.0 hrs

Paid leave taken

Not published

Median, same industry and size: 70.8%

Average tenure, men

Not published

Average tenure, women

Not published

Construction in Kumamoto

SYSKEN Co., Ltd.Women managers 2.6%
Denseisha Co., Ltd.Women managers 5.6%
Yuei Densetsu Co., Ltd.Women managers 14.3%
Maeda Sangyo Co., Ltd.Women managers 8.7%
Nishida Tekko Co., Ltd.Women managers 0.0%
Shirasagi Denki Kogyo Co., Ltd.Women managers 6.1%
Iizuka Denki Kogyo Co., Ltd.Women managers 4.9%

Every construction employer in Kumamoto →

Questions this page answers

What share of managers are women at Kaisei Kogyo Co., Ltd.?: 13.3%, as reported to MHLW's women's-advancement database (as of March 2026).
What is the gender pay gap at Kaisei Kogyo Co., Ltd.?: Women's average pay as a percentage of men's: 76.4% across all employees, 76.4% among regular employees. This compares average pay, not pay for the same job.
How much overtime do employees at Kaisei Kogyo Co., Ltd. work, and how much paid leave do they take?: Average overtime is 15.9 hours a month (median for the same industry and size: 16.0 hours), as reported to MHLW's women's-advancement database.

Japan Human Capital Data 2026

Every figure for about 36,000 unlisted employers and 3,789 listed companies at once: percentile ranks within each industry and size band, women among supervisors, ten-year retention by gender, women's leave uptake, and every foreign-owned subsidiary flagged with its parent. In a members' dashboard and as Excel and CSV.

What Professional includes

Source: Ministry of Health, Labour and Welfare, women's-advancement database (open data), as of 2026-10-06; figures are self-reported by each employer and checked for plausibility by The Hardest Market. 女性の活躍推進企業データベースオープンデータ（2026年10月6日時点）を加工して作成.