Kabushiki Kaisha (KK)

What Is a 株式会社?

A 株式会社 (kabushiki kaisha), commonly abbreviated as KK, is the most common and most prestigious form of corporation in Japan. It is a stock company (joint-stock corporation) where ownership is divided into shares and shareholders enjoy limited liability. The KK is roughly equivalent to a Corporation (Inc.) in the United States, a PLC/Ltd in the United Kingdom, or an AG/GmbH in Germany.

The KK has been the backbone of Japanese business for over a century. From major multinationals like Toyota and Sony to small family businesses, the vast majority of Japanese companies are organized as kabushiki kaisha. The "株式会社" prefix or suffix in a company name is one of the most recognized corporate identifiers in Japan.

Formation Requirements

Forming a KK involves several steps and requirements:

• Articles of Incorporation (定款) — must be drafted and notarized by a public notary (公証人). The notarization fee is ¥50,000, plus a ¥40,000 revenue stamp (waived for electronic notarization).
• Capital contribution — the legal minimum is ¥1, though practically most companies start with significantly more. Prior to the 2006 Companies Act reform, KK companies required a minimum of ¥10,000,000 in capital.
• Director(s) — at least one director (取締役) is required. There is no residency requirement for directors since the 2015 reform (previously at least one director had to reside in Japan).
• Registered office address — must be a physical address in Japan
• Corporate seal registration — the representative director must register a seal (印鑑) with the Legal Affairs Bureau
• Registration filing — submit the incorporation documents to the Legal Affairs Bureau with a registration tax of ¥150,000 (or 0.7% of capital, whichever is greater)

Governance Structure

Shareholders' Meeting (株主総会)

The shareholders' meeting is the supreme decision-making body of a KK. All KK companies must hold an annual general meeting (定時株主総会) within 3 months of the end of the fiscal year. Ordinary resolutions require a majority vote, while special resolutions (such as amending the articles or approving mergers) require a two-thirds supermajority.

Board of Directors (取締役会)

A board of directors is optional for small KK companies (those with share transfer restrictions). Large KK companies, listed companies, and companies that choose to establish one must have a board of at least 3 directors. The board appoints the representative director(s) who have authority to act on behalf of the company.

Auditors (監査役)

Companies with a board of directors are generally required to appoint at least one company auditor (監査役). Large companies (capital of ¥500 million or more, or liabilities of ¥20 billion or more) must have a board of auditors with at least 3 members, of whom at least half must be external.

Tax Treatment

KK companies are subject to corporate income tax at both the national and local levels. The combined effective corporate tax rate in Japan is approximately 30–34%, depending on the company's size and location. Key tax obligations include:

• National corporate tax (法人税) — 23.2% base rate (15% for the first ¥8 million of income for small companies)
• Local corporate tax (地方法人税)
• Enterprise tax (事業税) and special local corporate tax
• Inhabitants tax (住民税) — prefectural and municipal
• Consumption tax (消費税) — currently 10% on goods and services

KK vs. GK — Brief Comparison

The other major corporate form in Japan is the 合同会社 (GK). Here is how they compare:

• Formation cost — KK is more expensive (notarization required, higher registration tax) vs. GK (no notarization, ¥60,000 registration tax)
• Prestige — KK is generally viewed as more prestigious and is more familiar to Japanese business partners and banks
• Governance — KK has a more formal governance structure; GK is more flexible
• Profit distribution — KK must distribute profits proportional to shareholding; GK allows flexible distribution
• Tax treatment — identical corporate tax rates for both
• Fundraising — KK can issue shares to raise capital; GK cannot

Historical Context

The kabushiki kaisha form dates back to the Meiji era when Japan modernized its commercial law. Until the major Companies Act reform in 2006, forming a KK required a minimum capital of ¥10,000,000 (approximately $90,000 at the time). This high barrier was eliminated under the new law, making KK formation accessible to small businesses and startups. The 2006 reform also introduced the 合同会社 (GK) as a new company type modeled on the American LLC.