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(合併又は会社分割の無効判決の効力)
第八百四十三条   次の各号に掲げる行為の無効の訴えに係る請求を認容する判決が確定したときは、当該行為をした会社は、当該行為の効力が生じた日後に当該各号に定める会社が負担した債務について、連帯して弁済する責任を負う。

Effects of a Judgment of Invalidation of a Merger or Company Split
Article 843   When a judgment upholding a claim relating to an action seeking invalidation of any one of the acts listed in the following items becomes final and binding, the Company that carried out such act is liable jointly and severally to perform the obligations assumed by the Companies specified respectively in those items after the day on which such act became effective: 一   会社の吸収合併 吸収合併後存続する会社 (i)   Absorption-type Merger: the Company surviving the Absorption-type Merger; 二   会社の新設合併 新設合併により設立する会社 (ii)   Consolidation-type Merger: the Company that is incorporated in the Consolidation-type Merger; 三   会社の吸収分割 吸収分割をする会社がその事業に関して有する権利義務の全部又は一部を当該会社から承継する会社 (iii)   Absorption-type Company Split: the Company succeeding to all or part of the rights and obligations held by the Company effecting the Absorption-type Company Split in connection with its business by transfer from such Company; or 四   会社の新設分割 新設分割により設立する会社 (iv)   Incorporation-type Company Split: the Company that is incorporated in the Incorporation-type Company Split.

前項に規定する場合には、同項各号に掲げる行為の効力が生じた日後に当該各号に定める会社が取得した財産は、当該行為をした会社の共有に属する。 ただし、同項第四号に掲げる行為を一の会社がした場合には、同号に定める会社が取得した財産は、当該行為をした一の会社に属する。

In the cases prescribed in the preceding paragraph, the property acquired, after the day on which the acts listed in the items of that paragraph became effective, by the Companies specified respectively in those items is co-owned by the Companies that carried out such acts; provided, however, that in cases where the act set forth in item (iv) of that paragraph has been carried out by a single Company, the property acquired by the Company specified in that item is owned by the single Company that carried out such act. 一   会社の吸収合併 吸収合併後存続する会社 (i)   Absorption-type Merger: the Company surviving the Absorption-type Merger; 二   会社の新設合併 新設合併により設立する会社 (ii)   Consolidation-type Merger: the Company that is incorporated in the Consolidation-type Merger; 三   会社の吸収分割 吸収分割をする会社がその事業に関して有する権利義務の全部又は一部を当該会社から承継する会社 (iii)   Absorption-type Company Split: the Company succeeding to all or part of the rights and obligations held by the Company effecting the Absorption-type Company Split in connection with its business by transfer from such Company; or 四   会社の新設分割 新設分割により設立する会社 (iv)   Incorporation-type Company Split: the Company that is incorporated in the Incorporation-type Company Split.

第一項及び前項本文に規定する場合には、各会社の第一項の債務の負担部分及び前項本文の財産の共有持分は、各会社の協議によって定める。

In the cases prescribed in paragraph (1) and the main clause of the preceding paragraph, each Company's portion of the obligations to be assumed set forth in paragraph (1) and share of co-ownership of property set forth in the main clause of the preceding paragraph are decided through discussion among the Companies. 一   会社の吸収合併 吸収合併後存続する会社 (i)   Absorption-type Merger: the Company surviving the Absorption-type Merger; 二   会社の新設合併 新設合併により設立する会社 (ii)   Consolidation-type Merger: the Company that is incorporated in the Consolidation-type Merger; 三   会社の吸収分割 吸収分割をする会社がその事業に関して有する権利義務の全部又は一部を当該会社から承継する会社 (iii)   Absorption-type Company Split: the Company succeeding to all or part of the rights and obligations held by the Company effecting the Absorption-type Company Split in connection with its business by transfer from such Company; or 四   会社の新設分割 新設分割により設立する会社 (iv)   Incorporation-type Company Split: the Company that is incorporated in the Incorporation-type Company Split.

各会社の第一項の債務の負担部分又は第二項本文の財産の共有持分について、前項の協議が調わないときは、裁判所は、各会社の申立てにより、第一項各号に掲げる行為の効力が生じた時における各会社の財産の額その他一切の事情を考慮して、これを定める。

If no agreement is reached in the discussion set forth in the preceding paragraph with regard to each Company's portion of the obligations to be assumed set forth in paragraph (1) and share of co-ownership of property set forth in the main clause of the preceding paragraph, the court comes to a decision, in response to a petition by the Companies, by taking into account the amount of property of each Company as of the time the act set forth in any one of the items of paragraph (1) became effective and all other circumstances. 一   会社の吸収合併 吸収合併後存続する会社 (i)   Absorption-type Merger: the Company surviving the Absorption-type Merger; 二   会社の新設合併 新設合併により設立する会社 (ii)   Consolidation-type Merger: the Company that is incorporated in the Consolidation-type Merger; 三   会社の吸収分割 吸収分割をする会社がその事業に関して有する権利義務の全部又は一部を当該会社から承継する会社 (iii)   Absorption-type Company Split: the Company succeeding to all or part of the rights and obligations held by the Company effecting the Absorption-type Company Split in connection with its business by transfer from such Company; or 四   会社の新設分割 新設分割により設立する会社 (iv)   Incorporation-type Company Split: the Company that is incorporated in the Incorporation-type Company Split.