Keiko Ishii石井 啓子

Major shareholder of robot home Inc.

Net worth (est.)
¥1.6B
#2355 in Japan
Listed shares ¥370M + other assets ¥1.2B
Executive pay
—
Not disclosed
Dividends (a year)
¥4.2M
#6047
Total income (est.)
¥4.2M
#17837
Pay + dividends, before tax
Taxes (est.)
¥854,573
#16619
Income tax ¥640,473 / resident tax ¥214,100
Other assets (est.)
¥1.2B
After-tax income 2016–2025 (incl. ¥1.1B from share sales), before spending
Inheritance tax (est.)
¥323M
#2328
If a spouse and two children inherit in statutory shares (change)

Other assets (est.): the sum of each year's after-tax income (pay + dividends in own name − estimated taxes and social insurance) dividends retained by asset-management companies (less about 20% corporate tax), and proceeds from share sales (the drop in shares from the previous year × share price, less 20.315% tax, or about 30% for asset-management companies), for the years we have data. Spending, real estate, donations and savings from earlier years are not reflected.

Holdings

CompanyHeld bySharesStakePriceValueDividends
robot home Inc.
1435 · FY ending Dec 2025
Own name 2,091,000 2.32% ¥177 ¥370M ¥4.2M

By year

YearNet worthListed sharesPayDividendsTotal incomeTaxes (est.)After tax (est.)Share sales (after tax)
2025¥1.6B¥370M—¥4.2M¥4.2M¥854,573¥3.3M¥61.6M
2024¥1.5B¥342M—¥5.2M¥5.2M¥1.1M¥4.1M—
2023¥1.5B¥355M—¥4.2M¥4.2M¥854,573¥3.3M—
2022¥1.5B¥341M—¥4.2M¥4.2M¥854,573¥3.3M—
2021¥1.6B¥485M—¥2.1M¥2.1M¥429,786¥1.7M¥5.5M
2020¥1.6B¥492M—¥0¥0¥0¥0¥260M
2019¥1.9B¥1.0B—¥0¥0¥0¥0¥61.1M
2018¥1.9B¥1.1B—¥17.9M¥17.9M¥4.2M¥13.7M¥572M
2017¥2.0B¥1.8B—¥47.7M¥47.7M¥18.1M¥29.7M¥168M
2016¥4.7B¥4.6B—¥22.7M¥22.7M¥6.2M¥16.4M—

Net worth for each year is listed shares plus the other assets (est.) accumulated up to that year. 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.

Inheritance tax (estimate)

Estate ¥1.6B = listed shares in own name ¥370M + other assets (est.) ¥1.2B

Total inheritance tax paid: ¥323M (20.5% of the estate).

HeirInheritsTaxAfter tax
Spouse¥787M¥0¥787M
Each child¥393M¥161M¥232M

Japanese inheritance tax, assuming the estate is split in statutory shares. A spouse pays no tax up to ¥160M or the statutory share, whichever is larger. Family size is not in the securities reports, so you can choose it (with no children, parents or siblings also become heirs, so the real figure differs). Business-succession deferrals, lifetime gifts, donations to foundations, debts and other reliefs are not reflected.

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