石井 秀明石井 秀明

Major shareholder of Sansei Co.,Ltd.

Net worth (est.)
¥102M
#5467 in Japan
Listed shares
Executive pay
—
Not disclosed
Dividends (a year)
¥5.5M
#3605
Total income (est.)
¥5.5M
#5059
Pay + dividends, before tax
Taxes (est.)
¥1.1M
#4985
Income tax ¥841,804 / resident tax ¥279,830
Other assets (est.)
¥4.4M
¥106M with shares
After-tax income 2025–2026, before spending

Other assets (est.): the sum of each year's after-tax income (pay + dividends in own name − estimated taxes and social insurance) and dividends retained by asset-management companies (less about 20% corporate tax), for the years we have data. Spending, real estate, donations and savings from earlier years are not reflected.

Holdings

CompanyHeld bySharesStakePriceValueDividends
Sansei Co.,Ltd.
6307 · FY ending Mar 2026
Own name 172,000 2.22% ¥537 ¥92.4M ¥5.2M
Canare Electric Co., Ltd.
5819 · FY ending Dec 2025 · Director
Own name 5,100 — ¥1,870 ¥9.5M ¥336,600

By year

YearNet worthPayDividendsTotal incomeTaxes (est.)After tax (est.)
2026¥92.4M—¥5.2M¥5.2M¥1.1M¥4.1M
2025¥9.5M—¥336,600¥336,600¥73,380¥263,220

Grouped by the calendar year of each company's fiscal year-end. Years in which the person was not among the top 10 shareholders of a company exclude that company.

Estimates from annual securities reports (EDINET). The English name is romanized automatically and may differ from the spelling the person uses. Methodology · Corrections and removal requests: contact