The verdict in three sentences
Wealthy families and founders looking for a family office in Tokyo increasingly start their shortlist by asking AI assistants like ChatGPT, before they call a private banker or a lawyer. A family office with a bare holding page and no consistent factual information in Japanese and English is either missing from the answers or described loosely. Measuring that presence costs a market ballpark of 2,500 to 7,000 USD for an initial diagnostic, and the real question for a managing partner is whether the discretion you want is compatible with the credibility families and deal partners expect.
What are families and their advisors asking AI assistants?
A single family office often has no interest in being found: it serves one family. A multi family office, on the other hand, has to convince new families, Japanese founders who have just sold their company, foreign families settled in Minato or Shibuya, and co-investment partners. These audiences now ask assistants very precise questions. Here are realistic examples of that kind of search.
| Question asked to an AI assistant | Who asks it | What the answer needs to cite |
|---|---|---|
| Which multi family offices in Tokyo support a founder after selling their company? | Japanese founder, aged 50 to 65 | Wealth transition services, team, languages |
| Independent family office in Tokyo for an expat family, in English | Foreign family in Minato | Service languages, international clientele, jurisdictions covered |
| How do I choose between a private bank and a family office in Japan? | Second generation heir | Difference in model, fee structure, independence |
| Which Tokyo family office co-invests in Japanese private equity? | Fund manager, investment banker | Publicly described investment approach, criteria |
| Family office in Tokyo specialised in succession and jigyo shokei | Owner of a family business | Succession expertise, tax partners |
| What are typical fees for a multi family office in Tokyo? | Family comparing options | Fee model, without any return promise |
| Is this family office registered with the Japanese financial regulator? | The family's lawyer or advisor | Exact regulatory status, legal notices |
The last question is the most sensitive. If the assistant finds no clear public information about a firm's status, it may answer vaguely or, worse, confuse two entities with similar names. For a structure whose reputation is its main asset, that blur has a cost.
Why some family offices appear in answers and others do not
Assistants build their answers from what they can read and cross-check. A family office that is described accurately usually shares several traits: a site with factual pages (governance, team, services, approach to confidentiality), identical information in Japanese and English, mentions by credible third parties (business press, professional associations, conferences), structured data that identifies the organisation without ambiguity, and content that is dated and kept current.
| Signal | Family office often missing | Family office often cited |
|---|---|---|
| Website | One page, logo and address | Governance, team, services, confidentiality pages |
| Languages | Japanese only or English only | Consistent Japanese and English |
| Regulatory status | Not mentioned | Exact, verifiable legal notices |
| Third party mentions | None | Press, conferences, sector associations |
| Freshness | Last updated 4 years ago | Dated pages, reviewed every year |
| Structured data | Missing | Organisation, key people, address |
| Directory consistency | Diverging names and addresses | Same information everywhere |
Discretion does not rule these signals out. You can describe governance and an investment philosophy without publishing a single client family name or an asset figure. In Japan, the Act on the Protection of Personal Information (APPI), overseen by the Personal Information Protection Commission, governs how visitor and prospect data is collected; and if the firm provides advice or management to third parties, the Financial Instruments and Exchange Act and the Financial Services Agency may frame how it communicates. This is not legal advice: confirm with your usual counsel.
What does this work cover and what does it cost on the market?
AI visibility work covers, in broad terms: a review of what assistants say about the firm today, aligning public information, factual pages that answer the questions families actually ask, structured data, and regular measurement. The market is young in Tokyo and rates vary widely depending on whether you hire a local agency, a financial communications consultancy or an international studio.
| Service (2026 ballpark) | Local agency, in JPY | Approximate USD equivalent |
|---|---|---|
| Initial diagnostic, 2 languages | 400,000 to 1,000,000 JPY | 2,700 to 6,700 USD |
| Rewrite of factual pages | 900,000 to 2,500,000 JPY | 6,000 to 16,700 USD |
| Monthly answer tracking | 200,000 to 700,000 JPY | 1,300 to 4,700 USD |
| Financial press relations, per month | 500,000 to 1,500,000 JPY | 3,300 to 10,000 USD |
| Secure client portal | On quote | On quote |
These ranges reflect typical local agency quotes and public rate pages, converted approximately at 150 JPY to 1 USD. At Kolonell this work is on quote, after a diagnostic sized to the firm.
Measurement should be easy for a committee to read: a dated record of the answers to the same questions, asked every month in Japanese and English, the share of answers that mention the firm, and the accuracy of what is said (status, services, languages). No serious provider promises that an AI assistant will recommend your firm; they can only document how answers change.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Illustrative example: Hoshino Partners, a 9 person multi family office in Minato, serves 14 families. Its managing partner wants to know whether the firm exists in AI answers. The baseline record covers 20 questions in 2 languages, so 40 answers: the firm appears in 2 of them, or 5%, and one of those uses a former name.
Budget considered, as a market assumption: a 4,000 USD diagnostic, then 2,500 USD a month of tracking for 6 months, so 4,000 + 15,000 = 19,000 USD. If a single new family entrusts a mandate of 3 billion JPY (about 20 million USD) at 0.5% a year, annual fees come to roughly 100,000 USD, more than five times the budget. The partner does not bet on that mandate: the decision rests on the cost of a reputation described inaccurately.
FAQ
Does a single family office need to work on AI visibility?
Rarely to win clients, but often to control what is said about it. A record of 20 questions is enough to check that no answer confuses the family with another entity.
How long before answers change?
Usually 3 to 6 months after public information has been aligned. Third party mentions take longer than changes to the website.
Should we publish assets under management or client names?
No. Governance, team, services and languages are enough for answers to be accurate, without any confidential figure.
Must the Japanese and English versions say exactly the same thing?
Yes, on the facts: status, address, services, team. A mismatch between the two versions is one of the most common causes of wrong answers.
How do we know whether the budget is justified?
Compare the annual cost, often 15,000 to 60,000 USD on the market, with the fees from a single new mandate. For many multi family offices, the maths works on one mandate.
Find out how AI assistants describe your firm. A dated record of what assistants say about your family office today, in Japanese and English, is enough to decide. Request a diagnostic quote: reply within 48 hours.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
