事業承継 (jigyou shoukei) — Japan business-succession framework and 事業承継税制 inheritance / gift-tax deferral (法人版 / 個人版)

Wiki route

This entry sits under corporate-strategy INDEX and routes into finance INDEX for the deal-side overlay. It covers the owner-transition problem that sits behind much Japanese restructuring. Read it with holding-company conversion (a common pre-succession reorganization), Japan Kaisha Bunkatsu Tax Regime for carving a business ahead of a handover, and Japan MBO / squeeze-out process for the management-buyout route when no family or internal successor exists.

TL;DR

事業承継 (jigyou shoukei, business succession) is the transfer of both ownership and management of a company from one generation (or owner) to the next. In Japan it is a first-order economic problem: a large cohort of SME founders has reached retirement age, and many firms face closure not from insolvency but from a lack of a successor (後継者不在).

Three succession routes exist:

親族内承継 (family-internal) — to a child or relative.
親族外承継 / 役員・従業員承継 (internal non-family) — to a manager or employee, often via a management buyout (MBO).
M&A (third-party) — sale to an external acquirer when no internal successor exists.

The central tax obstacle in routes 1 and 2 is that transferring non-listed shares (非上場株式) triggers inheritance tax (相続税) or gift tax (贈与税) on shares that are illiquid and often highly valued — the heir can owe large tax on stock that cannot easily be sold to pay it. To solve this, Japan created the 事業承継税制 (business-succession tax system): a regime that defers, and ultimately can exempt, the inheritance / gift tax on qualifying non-listed shares, anchored in the 経営承継円滑化法 (Act on Facilitation of Succession of Management of SMEs).

The regime has two tracks:

法人版事業承継税制 (corporate version) — for shares of a non-listed company.
個人版事業承継税制 (individual version) — for the business assets of a sole proprietor (個人事業者).

Each has a 一般措置 (general measure) and a more generous 特例措置 (special measure).

1. The Succession Problem and the Three Routes

Route	Successor	Typical structure	Key issue
親族内承継	Child / relative	Gift or inheritance of shares	Inheritance / gift tax on illiquid 非上場株式
親族外（役員・従業員）承継	Manager / employee	Often [[finance/japan-mbo-and-squeeze-out-process	MBO]] (successor buys shares, often with acquisition finance)
M&A	Third-party acquirer	Share sale / 事業譲渡 / 会社分割	Valuation, capital-gains tax to seller

When an internal successor exists, the binding constraint is usually tax on the share transfer, which is exactly what the 事業承継税制 targets. When none exists, the company typically routes to M&A — using the divestiture mechanisms mapped in the spinoff decision tree or an outright sale, with acquirer funding drawn from Japan acquisition finance.

2. 法人版事業承継税制 (Corporate Version)

The corporate version lets a successor who acquires non-listed company shares by gift or inheritance defer the gift / inheritance tax on those shares, with eventual exemption when the next succession occurs or on the death of the predecessor / successor, subject to ongoing conditions.

一般措置 vs 特例措置

Feature	一般措置 (general)	特例措置 (special)
Deferral ratio (shares)	Capped (historically ~2/3 of shares, 80% of inheritance tax on those)	100% of the tax on qualifying shares deferred
Eligible shares	Limited	Effectively all shares
Predecessors / successors	One-to-one	Multiple predecessors → up to 3 representative successors
Employment requirement	Strict 80%-retention test	80% retention relaxed — deferral can continue if shortfall is justified with a reason report
Advance plan required	No	Yes — 特例承継計画 must be filed

The 特例措置 is the headline regime: it can defer 100% of the gift / inheritance tax on qualifying shares, removing the “tax on illiquid stock” trap almost entirely — provided the company keeps operating and the successor keeps the shares and management role.

Eligibility skeleton (high level)

Company must be a non-listed SME (中小企業者) under the SME Basic Act and not an asset-management company (資産保有型 / 資産運用型会社) in the disqualifying sense.
The transfer must run through the 経営承継円滑化法 certification (都道府県知事の認定).
The 特例措置 additionally requires a 特例承継計画 (special succession plan) confirmed by the prefectural governor before the succession, within the statutory filing window.

Filing-window timing (FY2026 reform)

Per the FY2026 (令和8年度) tax-reform outline, the 特例承継計画 filing deadline was extended: for the corporate version to 2027-09-30 (令和9年9月30日). (The individual version plan deadline was extended further, to 2028-09-30.) Critically, the actual succession (the gift or inheritance) must still occur by 2027-12-31 (令和9年12月31日) to use the 特例措置 — the plan extension does not move the succession deadline. Because deadlines shift with each annual reform, confirm current dates against the NTA / 中小企業庁 before relying on them.

3. 個人版事業承継税制 (Individual Version)

The individual version is the parallel regime for sole proprietors (個人事業者): instead of shares, it defers gift / inheritance tax on specified business assets (特定事業用資産) — land, buildings, and depreciable business assets used in the proprietor’s business — when the business is handed to a successor.

Requires an 個人事業承継計画 filed under the 経営承継円滑化法.
Interacts with the 小規模宅地等の特例 (small-business land valuation reduction) — the two cannot generally be stacked on the same land, so route selection matters.
The plan-filing deadline was extended (per the FY2026 reform) to 2028-09-30.

4. Reorganization Often Precedes Succession

Owner-managed firms frequently restructure first, then hand over, because a cleaner structure makes the succession (and the tax) more manageable:

持株会社化 ahead of succession — interposing a holding company can concentrate voting control in the successor, separate operating risk, and reshape the share base before the transfer. The conversion mechanics are in holding-company conversion; the HoldCo can then be the vehicle whose shares pass under the 事業承継税制.
会社分割 to separate keep-vs-sell businesses — split a multi-business company so the successor inherits the core while a non-core unit is sold or wound down. The split mechanics, including automatic employee transfer, are in Japan Kaisha Bunkatsu Tax Regime.
MBO when no family successor — a manager / employee buys the company, typically with leverage; the structure and financing sit in the MBO / squeeze-out process and leveraged-buyout economics.

5. Strategic Reading

The tax is the gating item for family succession: without the 事業承継税制, an heir can face large inheritance tax on shares that throw off little cash and cannot easily be sold — a classic forced-sale or forced-borrowing trap. The 特例措置’s 100% deferral is what makes orderly family succession viable for many SMEs.
Deferral is conditional, not free: the deferred tax can be clawed back if continuation conditions break (e.g., the successor disposes of the shares, the company stops operating, or — under the general measure — employment falls below the threshold without justification). It is a long-tail commitment, not a one-time exemption.
“No successor” is the real driver of Japan SME M&A: the same demographic gap that powers the succession-tax regime also feeds third-party M&A volume, linking this entry to the deal pipeline in finance and the operating-company cases in the strategic-restructuring matrix.
Policy finance is part of the toolkit: public lenders and credit-guarantee bodies offer succession-specific finance for successors funding a buy-in — the institutions are catalogued in policy-finance INDEX.

6. Counterpoints and Caveats

Deadlines are moving targets: the 特例措置 plan-filing and succession deadlines have been extended repeatedly by annual reforms; treat any specific date here as needing fresh confirmation against NTA / 中小企業庁 sources.
Disqualification risk: asset-holding / asset-management companies are designed out of the regime; structures that look like passive investment vehicles may not qualify.
Continuation burden: the regime presumes genuine ongoing operation and retained management — it is unsuited to a successor who plans a near-term sale.
Not a substitute for valuation discipline: deferring tax does not fix an over-concentrated or poorly governed cap table; pairing succession with a HoldCo conversion or partial restructuring is common for good reason.

Sources

国税庁 No.4148「非上場株式等についての相続税の納税猶予及び免除の特例等（法人版事業承継税制）」: https://www.nta.go.jp/taxes/shiraberu/taxanswer/sozoku/4148.htm
国税庁「法人版事業承継税制」パンフレット: https://www.nta.go.jp/publication/pamph/jigyo-shokei/houjin.htm
中小企業庁「法人版事業承継税制（特例措置）」: https://www.chusho.meti.go.jp/zaimu/shoukei/shoukei_enkatsu_zouyo_souzoku.html
METI 経済法制 policy portal: https://www.meti.go.jp/policy/economy/keiei_innovation/keizaihousei/
中小企業庁「経営承継円滑化法による支援」（中小企業における経営の承継の円滑化に関する法律, Act No. 33 of 2008 — 都道府県知事認定 / 申請マニュアル）: https://www.chusho.meti.go.jp/zaimu/shoukei/shoukei_enkatsu.html

[!info] 校核状态 confidence: likely. Regime structure (法人版 / 個人版, 一般措置 / 特例措置, 100% deferral under the special measure, 経営承継円滑化法 base) is confirmed against NTA and 中小企業庁. Deadlines move with each annual tax reform — the FY2026-reform plan-filing extensions (corporate 2027-09-30, individual 2028-09-30; succession deadline 2027-12-31) should be re-confirmed before reliance. Specific eligibility is case-specific; consult a tax professional.