Japan trust bank and custody map

Overview

Japan’s trust-bank / custody layer separates legal title, beneficial owner, asset administration, investment instruction, corporate actions, voting, stock lending, and fund accounting. The key mistake is to read “trust account” nominee names in filings as if the trust bank itself were the economic investor.

Use this page with banking domain, master trust / custody bank landscape, Master Trust Bank of Japan, Custody Bank of Japan, Sumitomo Mitsui Trust, Mitsubishi UFJ Trust Bank, stock lending route, and securities market infrastructure.

Function Map

Function	What it means
Trust banking	Bank plus trust-business functions under the trust / banking regulatory route.
Asset administration	Safekeeping, settlement, corporate actions, income collection, fund accounting, reporting, and recordkeeping.
Master custody	Centralized asset-administration service for institutional investors / funds.
Nominee name	Legal-title / book-entry name that may differ from beneficial owner.
Investment instruction	Usually comes from asset owner, investment manager, or fund structure, not the custodian itself.
Stock lending support	Securities may be lent under instruction and control arrangements, creating securities-finance links.

Main Institution Types

Type	Examples	Typical role
Full-service trust bank	[[trust-banks/mitsubishi-ufj-trust-bank	Mitsubishi UFJ Trust Bank]], [[trust-banks/mizuho-trust-bank
Asset-administration specialist	[[trust-banks/master-trust-bank	Master Trust Bank of Japan]], [[trust-banks/custody-bank
Global custodian / ICSD in Japan	[[foreign-financial-institutions/bny-mellon-japan	BNY Mellon Japan]], [[foreign-financial-institutions/state-street-japan
Securities depository / settlement infrastructure	[[securities/japan-securities-depository-center	JASDEC]], [[securities/japan-securities-clearing-corp

Interpretation Rules

Public artifact	How to read it
”信託口” major shareholder name	Nominee / trust-account name; do not infer proprietary ownership by the trust bank.
Custodian balance / assets under custody	Client assets under administration, not the bank’s own investment portfolio.
Voting-right disclosure	Voting instruction usually belongs to asset owner / manager; custodian may execute mechanically.
Securities lending revenue	May belong partly to beneficial owners depending on lending program terms.
Fund accounting / NAV operations	Operational asset-servicing layer, not investment decision itself.

Capital-Market Links

Trust-bank custody links banking to securities-market infrastructure:

settlement and corporate actions through JASDEC and market infrastructure;
ICSD / cross-border custody through Euroclear Bank Japan and Clearstream Banking Japan;
margin / stock lending through stock lending route and JSF;
investment-trust and pension flows through NISA / household asset-building and asset-management pages;
issuer shareholder analysis through TSE filings and major-shareholder tables.

Research Checklist

Identify whether the trust bank is acting as trustee, custodian, fund administrator, transfer agent, securities agent, or proprietary balance-sheet actor.
Separate nominee name from beneficial owner before drawing ownership conclusions.
Check FSA trust-bank / trust-company lists and the Trust Companies Association explanation.
Link stock lending and short-sale questions to stock lending rather than treating custody balances as short signals.
For current AUC / AuA figures, record the source date because custody balances move with market prices and new mandates.

Sources

FSA: list of trust-business financial institutions.
FSA: trust-company supervisory guideline section for trust-business financial institutions.
Trust Companies Association of Japan: trust-bank explanation and member-company list.
JASDEC / JSCC / BoJ: securities settlement, DVP, and JGB book-entry public materials.
Master Trust Bank of Japan: official business overview.
Custody Bank of Japan: official company / business explanation.