Naoya Mizuyama水山 直也

Director, コロンビア・ワークス株式会社

Net worth (est.)
¥1.1B
#2217 in Japan
Listed shares
Executive pay
—
Not disclosed
Dividends (a year)
¥24.9M
#1949
Total income (est.)
¥24.9M
#4468
Pay + dividends, before tax
Taxes (est.)
¥7.5M
#4217
Income tax ¥5.5M / resident tax ¥2.0M
Other assets (est.)
¥133M
¥1.2B with shares
After-tax income 2023–2025 (incl. ¥89.4M from share sales), before spending

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
コロンビア・ワークス株式会社
146A · FY ending Dec 2025 · Director
Own name 319,400 4.14% ¥3,446 ¥1.1B ¥24.9M

By year

YearNet worthPayDividendsTotal incomeTaxes (est.)After tax (est.)Share sales (after tax)
2025¥1.1B—¥24.9M¥24.9M¥7.5M¥17.5M¥73.2M
2024¥610M—¥18.4M¥18.4M¥4.3M¥14.0M¥16.1M
2023¥630M—¥15.0M¥15.0M¥3.1M¥11.9M—

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