Hisako Yamamoto
Source of wealth: Retail
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The scale of their wealth
Health
The price of life
Let's compare Hisako Yamamoto's fortune with the healthcare spending of a massive country
Hisako Yamamoto could fund the entire healthcare system of DR Congo, with a population of over 105,800,000 people, for approximately 0.5 years.
But even if we compare their fortune with that of a rich country
On the other end, Hisako Yamamoto could cover the healthcare spending of Luxembourg, considered the most heavily funded healthcare system in the world, for 0.2 years.
Education
Buying the future
Let's also compare their fortune with education spending, first with a poor country
Hisako Yamamoto could cover the total cost of Nigeria's education system, the most populous country in Africa with over 243,000,000 inhabitants, for 0.3 years.
And yes, we can also compare it with a rich country
But they couldn't just cover the cost of a poor country; Luxembourg is considered the country with the highest per capita investment in education in the world, and Hisako Yamamoto could pay for it entirely for 0.4 years.
Research
The monopoly on progress
Coming full circle, we think it's also interesting to add another gigantic country
Hisako Yamamoto could fully fund the state research budget of Pakistan, the fifth most populous country in the world with over 260,000,000 inhabitants, for 1.9 years.
And of course, the country that invests the most per capita worldwide
But even if we compare the total wealth of Hisako Yamamoto with Israel, the country that invests the most per capita in research in the world, they could cover the total cost of the system for 0.0 years.
Gold
Everyday luxuries
Hisako Yamamoto's fortune is equivalent to 8 tons of gold. It's hard to process, since we don't usually keep a handful of gold bars in our piggy banks.
A standard gold ring usually weighs between 4 and 7 grams. Let's say this one weighs 5 grams. It's usually 18 karats.
Based on today's gold price (excluding the jeweler's commission, shipping, or anything else), that ring would be worth $546.86.
Hisako Yamamoto could buy 2,047,983 gold rings. That's a lot of fingers and way too many gifts!!
And if you're struggling to visualize that many rings, it would take 0 trucks to transport them. Although Hisako Yamamoto will almost certainly have enough money left over to pay for the gas.
Biography
Hisako Yamamoto is the daughter of Seven & I Holding's late honorary chairman Masatoshi Ito and gets her wealth from her stake in the global retailing giant.
Her two siblings, Junro Ito and Yasuhisa Ito, are also billionaires based on their stakes.
Masatoshi Ito, who helped build 7-Eleven into a global giant, died in March 2023 at age 98.
Seven & i Holdings has 87,000 stores in 19 countries and nearly $80 billion in annual revenue.
In 2024, Canadian retail giant, Alimentation Couche-Tard made a $47 billion takeover bid for the company but withdrew in July 2025 citing the retailer's lack of cooperation during negotiations.
Financial Assets
Monthly wealth history
Fortune comparison
Historical data not available for comparison