---
title: "日本証券金融 (JSF)"
aliases: ["JSF", "Japan Securities Finance", "日本証券金融", "日証金", "8511"]
domain: financial-regulators
created: 2026-05-20
last_updated: 2026-07-29
last_tended: 2026-07-29
review_by: 2026-10-27
confidence: likely
tags: [JapanFG, securities, securities-finance, margin, listed-company]
status: active
entity_node:
  kind: public_infrastructure
  scope: japan_core
  status: anchor
sources:
  - "https://www.jsf.co.jp/ja/about/outline.html"
  - "https://www.jsf.co.jp/ja/ir.html"
  - "https://www.fsa.go.jp/menkyo/menkyoj/kinyushohin.xlsx"
---

# 日本証券金融 (JSF)

## Wiki route

This entry sits under [[financial-regulators/INDEX|financial-regulators INDEX]]. Read it against [[financial-regulators/japan-exchange-group|日本取引所グループ (JPX)]] for peer / contrast context and [[securities/INDEX|securities index]] for the broader system / regulatory boundary.

## TL;DR

Japan Securities Finance is Japan's listed securities-finance company and a key wholesale layer behind margin trading, stock lending, and securities financing. Official company materials define its business as securities finance under the Financial Instruments and Exchange Act, including loan transactions, securities finance, and securities investment operations.

For FinWiki, JSF links retail margin trading, institutional stock lending, broker funding, and PTS / exchange settlement plumbing on the [[securities/INDEX|securities]] side, with peers like [[securities-firms/matsui-sec|松井証券]] and infrastructure adjacency to [[securities/japan-securities-clearing-corp|JSCC]] central clearing.

## 1. 会社概要

| Item | Reading |
|---|---|
| Legal name | Japan Securities Finance Co., Ltd. |
| Japanese name | 日本証券金融株式会社 |
| Short name | 日証金 / JSF |
| Founded | 1927-07 |
| Securities-finance business start | 1950-02 |
| Capital | 10.0 billion yen |
| Listing | Tokyo Stock Exchange Prime Market |
| Core business | Securities finance under the FIEA |

Sources: ^[Japan Securities Finance company profile: https://www.jsf.co.jp/ja/about/outline.html; FSA financial-instruments operator workbook: https://www.fsa.go.jp/menkyo/menkyoj/kinyushohin.xlsx.]

## 2. 事業セグメント・マップ

| Layer | Function |
|---|---|
| Loan transactions | Standardized financing and stock-lending layer for margin transactions. |
| Securities finance | Lending, borrowing, and collateralized finance tied to listed securities. |
| Securities investment | Investment and treasury operations. |
| Trust-bank adjacency | JSF group includes trust-bank functions through Nisshokin Trust Bank. |

Sources: ^[Japan Securities Finance company and investor-relations pages: https://www.jsf.co.jp/ja/about/outline.html; https://www.jsf.co.jp/ja/ir.html.]

## 3. 戦略・競争

JSF is a quiet infrastructure company. Its importance rises when:

- retail margin trading expands;
- stock lending and short-selling demand increase;
- PTS markets require borrow / lend and clearing-linked settlement support;
- collateral and securities-finance conditions become stress indicators.

## 4. 規制・政策

JSF operates in the securities-finance layer of the FIEA ecosystem. It is not an exchange, but it is tightly connected to exchange-market liquidity, margin regulation, broker risk management, and securities lending.

## Related

- [[securities/tokyo-stock-exchange]]
- [[securities/japannext-securities]]
- [[securities/osaka-digital-exchange]]
- [[securities/japan-securities-clearing-corp]]
- [[securities-firms/matsui-sec]]
- [[securities-firms/rakuten-securities]]

## Sources

- Japan Securities Finance: Company outline.
- Japan Securities Finance: IR materials.
- FSA: Financial instruments business operator list.