When I speak with members of Japan's ultra-wealthy, the conversation is rarely about growing the balance sheet. Far more often, it turns to what they want to leave behind, whom they will entrust it to, and how long they should keep holding what they have.
The definition of wealth is not simply the size of one's assets. It is the freedom to choose how you spend your own time. The ability to protect the people who matter to you. The space to make quiet decisions alongside people you trust. Through years of advising on real estate and assets in Japan, I have learned this lesson many times over.
For readers outside Japan, it is worth saying at the outset: this is a distinctly Japanese way of framing affluence. In many Western wealth-management cultures, the headline metric is return and net-worth growth. The perspective I describe here, shaped by Japanese family-business owners and long-term asset holders, places quiet continuity and succession at the center. It is less an investment thesis than a philosophy of stewardship.
Key points of this article
- The definition of wealth is closer to "holding real options while keeping your mind undisturbed" than to any asset figure.
- The ultra-wealthy look past price to time horizon, past ownership to stewardship, and past yield to the peace that follows a clean succession.
- As money grows, so does the complexity of asset management, inheritance, relationships, and decision-making.
- The work INA values, protecting assets, is not only about the numbers. It is about ordering the future of people and relationships.
What is the definition of wealth?
The definition of wealth is not just how much money you hold. It is the state of being able to decide life's important choices by your own will.
In its report published in February 2025, the Nomura Research Institute (野村総合研究所, NRI, one of Japan's largest research and consulting firms) classifies households with net financial assets of ¥500 million or more (approx. USD 3.3 million as of 2026-06) as "super-wealthy" (超富裕層, chō-fuyūsō), and estimated some 118,000 such households as of 2023. By the numbers, the super-wealthy are simply a segment holding very large financial assets.
Yet the sense of wealth I feel when I meet them in person cannot be explained by balances alone. The larger the assets, the more carefully these owners weigh how to spend their time, whom to keep close, and what to leave to the next generation.
One business owner, before asking about a property's yield, said to me: "Can I explain this place to my children?" In that single sentence I saw the essence of wealth. Rather than winning on the numbers, he wanted to make a decision he could stand behind for the next generation. There, quietly, was the true standard of a person of means.
The time horizon the ultra-wealthy see
The ultra-wealthy do not judge by today's gains and losses alone. They consider what it means to hold an asset across ten years, thirty years, into the next generation.
In a conventional investment decision, yield, price, tax efficiency, and exit strategy take priority. These matter, of course. But for the ultra-wealthy, another question is added: "Will this asset still protect my family and my business as time passes?"
Real estate is an asset that lends itself well to that question. Buildings age. Neighborhoods change. Neglect management and value falls. But in a good location, with good management sustained and trust among stakeholders kept intact, time can become an ally. Unlike the more transactional, exit-oriented mindset common in many Anglo-American property markets, the families I work with often measure success in decades, not in the spread between purchase and sale.
The idea that the wealthy evaluate assets by time horizon rather than price is very close to this sensibility. There are people who value being able to hold an asset with peace of mind for a long time over buying it cheaply.
Wealth also means not being rushed. Not selling in haste. Not buying in haste. Not choosing people in haste. Being able to decide on your own time horizon is one of the great freedoms that assets can bring.
Why doesn't anxiety disappear even as money grows?
Anxiety does not disappear as money grows because, the more assets increase, the more there is to protect. The weight of management, succession, relationships, and decision-making grows in step.
Assets create security. But they also create responsibility. Which assets to keep. Which property to sell. Whom to entrust. How to explain it to heirs. As assets grow, decisions cease to be a personal matter and begin to affect family, company, employees, and community.
Japan's Cabinet Office (内閣府, Naikaku-fu) conducts the "Survey on Satisfaction and Quality of Life" (満足度・生活の質に関する調査), whose aim is to understand the economy and society not by GDP alone but multidimensionally, through the lens of well-being. This overlaps with a broader social shift toward not measuring affluence by numbers alone, a shift many readers in Europe and elsewhere will recognize from their own well-being debates.
The same holds on the ground in real estate. It is not the simple story that rising asset figures make you happy. Anxiety about management, anxiety about inheritance, anxiety at having no trustworthy person to consult, if these remain, assets can instead weigh on the heart.
As I wrote in why the wealthy do not trust their advisors, what is truly needed is not someone who sells products, but someone who will tell you the inconvenient facts as well. Wealth cannot do without a trusted person to turn to.
The truly wealthy decide what not to own
The truly wealthy do not only add to what they own; they decide what not to own. Protecting open space, too, is an essential condition of wealth.
The phrase "super-wealthy" may conjure mansions, second homes, luxury cars, watches, and art. Some certainly enjoy such things. But the people I deeply respect look less at the quantity of possessions and more at whether something fits the life they actually live.
Not holding on to real estate they do not use. Not making investments they cannot explain. Not multiplying relationships that drain them at every meeting. Not spending time on appearances. From the outside, these "decisions not to hold" look unremarkable.
Yet within that plainness lies strength. Because there is open space, they can listen to their family. They can notice changes in their employees. They can turn their attention to community and society. Wealth is not being able to buy anything; it is being able to keep space for the things that matter.
The World Happiness Report 2025 takes as its theme the effect of caring and sharing on happiness. I strongly share this view. Wealth has a side that grows smaller the more you hoard it, and deeper the more you use it for others.
What INA learned about the essence of protecting assets
The essence of protecting assets, as INA has learned it, is not only ordering the numbers. It is ordering things to the point where the person who receives them next will not be burdened.
As a real estate company, we cannot ignore yield and price. Management fees, repairs, occupancy, exit price, and tax effects all matter. But if a proposal ends there, it does not reach the true concerns of the ultra-wealthy.
Suppose an owner who holds a whole building is torn between selling and passing it to the next generation. What is needed is not the appraisal figure alone. It is laying out everything: the future management burden, the heirs' level of interest, the restructuring of any borrowing, the relationship with the community, and the accountability that comes with keeping it.
To protect assets is not only to keep them from shrinking. It is to order them so that the next person can receive them as meaning, not as a burden.
The essence of wealth I touched on in how the definition of success changes ultimately returns here, I feel. The larger the assets one holds, the more the question becomes "what to leave" rather than "what to gain."
Bringing the definition of wealth back to work and life
The definition of wealth is not a matter for the ultra-wealthy alone. For everyone, it is the question of what to spend your own time on.
Asset levels differ from person to person. So do circumstances. But the axis along which we consider wealth is shared. What do you hold dear? Whom do you want to protect? What, if you let it go, would quiet your mind?
The same is true in running a company. Growing revenue matters. But chase revenue alone and your people (jinzai, 人財, the talented individuals INA deliberately writes with the character for "treasure" rather than "material") wear down, trust with customers thins, and over the long term the company's foundation weakens. That is precisely why INA places people, trust, and the long view at the center of management.
Wealth is having options. And it is being able, when you have those options, to choose quietly in line with your own values.
The definition of wealth that Japan's ultra-wealthy taught me is not, for me, "having a great deal." It is being able to use time, assets, and trust rightly in order to protect what matters. I hope to let that quietness dwell in our work as well.
Frequently asked questions (FAQ)
Q1. Who counts as ultra-wealthy?
A. Generally, the term refers to those with net financial assets of ¥500 million or more (approx. USD 3.3 million as of 2026-06). In this essay, however, the focus is on values and decision-making axes rather than on asset figures.
Q2. Does the definition of wealth differ from person to person?
A. Yes, it does. What is common is that wealth involves not only money but time, health, trust, family, and freedom of choice in a deep way.
Q3. How does real estate relate to wealth?
A. Real estate is an asset, and at the same time a vessel that gives form to daily life, succession, and one's relationship with the community. Depending on management, it can bring peace of mind or become a burden.
Q4. What should you consider first in order to protect your assets?
A. First, clarify not what you want to grow, but what you want to protect. Once the purpose is set, investment decisions fall into place.
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