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Commercial Code

商法(しょうほう)

Chapter I General Provisions

The law as Act on the Arrangement of Related Acts upon the Enforcement of the Act Partially Amending the Civil Code, etc. (Act No. 46 of 2026) leaves it, with the words it changes marked.

The main text is read a page at a time: a chapter to a page, and a long chapter in runs of articles. The whole main text, and the supplementary provisions and appended tables this amendment changes. Those it leaves untouched are on the page for the text in force.

How the changes are shown

Underlined: words the amendment adds. A bar: where it removes words.Underlined: words the amendment adds. Struck through: the words it removes.Underlined: words the amendment adds. Struck through: the words it removes.

Part II Commercial Transactions第二編 商行為

Chapter I General Provisions第一章 総則

Article 501第五百一条

Transactions Absolutely Regarded as Commercial Transactions Due to Their Nature(絶対的商行為)
Article 501, paragraph (1)

The following actions are commercial transactions:

次に掲げる行為は、商行為とする。

Article 501, paragraph (1), item (i)

an action through which a person seeks to acquire for value a movable, real property, or a negotiable instrument of value from whose transfer the person wishes to profit, or an action through which a person seeks to transfer an object so acquired;

利益を得て譲渡する意思をもってする動産、不動産若しくは有価証券の有償取得又はその取得したものの譲渡を目的とする行為

Article 501, paragraph (1), item (ii)

an action through which a person seeks to make an acquisition for value in order to form and perform on a contract to supply a movable or negotiable instrument of value acquired from another person;

他人から取得する動産又は有価証券の供給契約及びその履行のためにする有償取得を目的とする行為

Article 501, paragraph (1), item (iii)

a transaction conducted on an exchange;

取引所においてする取引

Article 501, paragraph (1), item (iv)

an action involving a bill, note, or other commercial instrument.

手形その他の商業証券に関する行為

Article 502第五百二条

Transactions Regarded as Commercial Transactions If Conducted as Business(営業的商行為)
Article 502, paragraph (1)

The following actions are commercial transactions only if they are taken as a part of business; provided, however, that this does not apply if the action is taken by a person that manufactures a product or engages in labor for the sole purpose of earning wages:

次に掲げる行為は、営業としてするときは、商行為とする。ただし、専ら賃金を得る目的で物を製造し、又は労務に従事する者の行為は、この限りでない。

Article 502, paragraph (1), item (i)

an action through which a first person seeks to acquire for value or rent from a second person a movable or real property from whose rental to a third person the first person wishes to profit, or an action through which one person seeks to rent to another person property so acquired or rented;

賃貸する意思をもってする動産若しくは不動産の有償取得若しくは賃借又はその取得し若しくは賃借したものの賃貸を目的とする行為

Article 502, paragraph (1), item (ii)

an action relating to manufacturing or processing undertaken for another person's benefit;

他人のためにする製造又は加工に関する行為

Article 502, paragraph (1), item (iii)

an action relating to the supplying of electricity or gas;

電気又はガスの供給に関する行為

Article 502, paragraph (1), item (iv)

an action relating to transportation;

運送に関する行為

Article 502, paragraph (1), item (v)

undertaking a contract for work or labor;

作業又は労務の請負

Article 502, paragraph (1), item (vi)

an action relating to publishing, printing, photography, or filming;

出版、印刷又は撮影に関する行為

Article 502, paragraph (1), item (vii)

a transaction at an establishment at which it is intended for customers to gather;

客の来集を目的とする場屋における取引

Article 502, paragraph (1), item (viii)

exchanging money or making another banking transaction;

両替その他の銀行取引

Article 502, paragraph (1), item (ix)

providing insurance;

保険

Article 502, paragraph (1), item (x)

undertaking a bailment;

寄託の引受け

Article 502, paragraph (1), item (xi)

an action relating to brokerage or intermediation;

仲立ち又は取次ぎに関する行為

Article 502, paragraph (1), item (xii)

undertaking the role of agent for a commercial transaction;

商行為の代理の引受け

Article 502, paragraph (1), item (xiii)

undertaking a trust.

信託の引受け

Article 503第五百三条

Auxiliary Commercial Transactions(附属的商行為)
Article 503, paragraph (1)

An action taken by a merchant for the benefit of its business is a commercial transaction.

商人がその営業のためにする行為は、商行為とする。

Article 503, paragraph (2)

The actions of a merchant are presumed to be done for the benefit of its business.

商人の行為は、その営業のためにするものと推定する。

Article 504第五百四条

Acting as Agent in Commercial Transactions(商行為の代理)
Article 504, paragraph (1)

Even if the agent for a commercial transaction conducts the transaction without representing that it is doing so on behalf of the principal, the actions of the agent bind the principal; provided, however, that if the other party does not know that the agent is conducting the transaction on behalf of the principal, these provisions do not preclude the other party from demanding that the agent perform the obligations arising from the transaction.

商行為の代理人が本人のためにすることを示さないでこれをした場合であっても、その行為は、本人に対してその効力を生ずる。ただし、相手方が、代理人が本人のためにすることを知らなかったときは、代理人に対して履行の請求をすることを妨げない。

Article 505第五百五条

Entrustment of Commercial Transactions(商行為の委任)
Article 505, paragraph (1)

A person entrusted with conducting a commercial transaction may take actions that the person is not entrusted with taking, to the extent that this does not conflict with the main purpose of the entrustment.

商行為の受任者は、委任の本旨に反しない範囲内において、委任を受けていない行為をすることができる。

Article 506第五百六条

Special Provisions on Reasons for Lapse of a Person's Authority to Act as Agent Due to Entrustment of Commercial Transactions(商行為の委任による代理権の消滅事由の特例)
Article 506, paragraph (1)

A person's authority to act as the agent of a principal based on that person's entrustment with conducting a commercial transaction does not lapse upon the death of the principal.

商行為の委任による代理権は、本人の死亡によっては、消滅しない。

Article 507第五百七条

Article 507, paragraph (1)

Deleted

削除

Article 508第五百八条

Offers to Contract between Merchants at a Distance(隔地者間における契約の申込み)
Article 508, paragraph (1)

If merchants are at a distance from each other and the party receiving an offer to contract not specifying a period for acceptance does not issue notice of its acceptance within a reasonable period of time, the offer ceases to be valid.

商人である隔地者の間において承諾の期間を定めないで契約の申込みを受けた者が相当の期間内に承諾の通知を発しなかったときは、その申込みは、その効力を失う。

Article 508, paragraph (2)

The provisions of Article 524 of the Civil Code apply mutatis mutandis to a case as referred to in the preceding paragraph.

民法第五百二十四条の規定は、前項の場合について準用する。

Article 509第五百九条

Duty of Party Receiving Offer to Contract to Give Notice of Acceptance or Refusal(契約の申込みを受けた者の諾否通知義務)
Article 509, paragraph (1)

If a merchant receives an offer to contract that is in its line of business from a person with which it has regular dealings, the merchant must issue notice of its acceptance or refusal of the offer to contract without delay.

商人が平常取引をする者からその営業の部類に属する契約の申込みを受けたときは、遅滞なく、契約の申込みに対する諾否の通知を発しなければならない。

Article 509, paragraph (2)

If a merchant neglects to issue a notice as referred to in the preceding paragraph, it is deemed to have accepted the offer to contract referred to in that paragraph.

商人が前項の通知を発することを怠ったときは、その商人は、同項の契約の申込みを承諾したものとみなす。

Article 510第五百十条

Duty of the Party Receiving Offer to Contract to Take Custody of Goods(契約の申込みを受けた者の物品保管義務)
Article 510, paragraph (1)

If, along with the offer that a merchant receives for a contract that is in its line of business, the merchant also receives goods, it must store those goods at the expense of the offeror, even if it refuses the offer; provided, however, that this does not apply if the value of the goods is insufficient to compensate for the costs of the storage, or if the merchant will incur damage from the storage.

商人がその営業の部類に属する契約の申込みを受けた場合において、その申込みとともに受け取った物品があるときは、その申込みを拒絶したときであっても、申込者の費用をもってその物品を保管しなければならない。ただし、その物品の価額がその費用を償うのに足りないとき、又は商人がその保管によって損害を受けるときは、この限りでない。

Article 511第五百十一条

Joint and Several Liability for Obligations Among Multiple Parties(多数当事者間の債務の連帯)
Article 511, paragraph (1)

When two or more persons assume an obligation by way of an action that constitutes a commercial transaction for any one or all of them, they assume that obligation jointly and severally.

数人の者がその一人又は全員のために商行為となる行為によって債務を負担したときは、その債務は、各自が連帯して負担する。

Article 511, paragraph (2)

If there is a guarantor and an obligation arises from a commercial transaction by the principal obligor or the guarantee constitutes a commercial transaction, the principal obligor and the guarantor assume the obligation jointly and severally, even if they have assumed the obligation by way of separate actions.

保証人がある場合において、債務が主たる債務者の商行為によって生じたものであるとき、又は保証が商行為であるときは、主たる債務者及び保証人が各別の行為によって債務を負担したときであっても、その債務は、各自が連帯して負担する。

Article 512第五百十二条

Claim to Remuneration(報酬請求権)
Article 512, paragraph (1)

When a merchant takes an action for another person that is within the scope of the merchant's business, it may claim reasonable remuneration.

商人がその営業の範囲内において他人のために行為をしたときは、相当な報酬を請求することができる。

Article 513第五百十三条

Claim to Interest(利息請求権)
Article 513, paragraph (1)

If money is lent between merchants, the lender may claim statutory interest.

商人間において金銭の消費貸借をしたときは、貸主は、法定利息を請求することができる。

Article 513, paragraph (2)

If a merchant pays money on behalf of another person within the scope of the merchant's business, the merchant may claim statutory interest for the period beginning on the date of the payment.

商人がその営業の範囲内において他人のために金銭の立替えをしたときは、その立替えの日以後の法定利息を請求することができる。

Article 514第五百十四条

Article 514, paragraph (1)

Deleted

削除

Article 515第五百十五条

Exemptions from the Prohibition on the Use or Disposal of Things Pledged by Contract(契約による質物の処分の禁止の適用除外)
Article 515, paragraph (1)

The provisions of Article 349 of the Civil Code do not apply to a pledge created to secure an obligation arising from a commercial transaction.

民法第三百四十九条の規定は、商行為によって生じた債権を担保するために設定した質権については、適用しない。

Article 516第五百十六条

Place for Performance of Obligations(債務の履行の場所)
Article 516, paragraph (1)

If the place where an obligation arising from a commercial transaction is to be performed cannot be specified owing to the nature of the transaction or the manifestation of the intentions of the parties, the delivery of a specific thing must be effected at the place where the thing is at the time of the transaction, and any other obligation must be performed at the current place of business of the obligee (or at the obligee's domicile, if the obligee has no place of business).

商行為によって生じた債務の履行をすべき場所がその行為の性質又は当事者の意思表示によって定まらないときは、特定物の引渡しはその行為の時にその物が存在した場所において、その他の債務の履行は債権者の現在の営業所(営業所がない場合にあっては、その住所)において、それぞれしなければならない。

Articles 517 to 520第五百十七条から第五百二十条まで

Articles 517 to 520, paragraph (1)

No English for this provision yet.

削除

Article 521第五百二十一条

Right of Retention Between Merchants(商人間の留置権)
Article 521, paragraph (1)

If performance is due on a claim arising between merchants from an action that constitutes a commercial transaction for both parties, the obligee may retain an object or negotiable instrument of value belonging to the obligor that the obligee has gained possession of in the commercial transaction with the obligor, until the claim is satisfied; provided, however, that this does not apply if the parties have manifested a different intention.

商人間においてその双方のために商行為となる行為によって生じた債権が弁済期にあるときは、債権者は、その債権の弁済を受けるまで、その債務者との間における商行為によって自己の占有に属した債務者の所有する物又は有価証券を留置することができる。ただし、当事者の別段の意思表示があるときは、この限りでない。

Articles 522 to 523第五百二十二条から第五百二十三条まで

Articles 522 to 523, paragraph (1)

No English for this provision yet.

削除

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