法令翻訳 http://www.japaneselawtranslat...amp;page=4

(他の登記所の管轄区域内への支店の移転の登記)
第九百三十一条   会社がその支店を他の登記所の管轄区域内に移転したときは、旧所在地（本店の所在地を管轄する登記所の管轄区域内にある場合を除く。）においては三週間以内に移転の登記をし、新所在地（本店の所在地を管轄する登記所の管轄区域内にある場合を除く。以下この条において同じ。）においては四週間以内に前条第二項各号に掲げる事項を登記しなければならない。 ただし、支店の所在地を管轄する登記所の管轄区域内に新たに支店を移転したときは、新所在地においては、同項第三号に掲げる事項を登記すれば足りる。

Registration of Relocation of a Branch Office to the Jurisdictional District of Another Registry Office
Article 931   When a Company relocates a branch office to the jurisdictional district of another registry office, the registration of relocation must be completed at the old location (excluding cases where the old location is within the jurisdictional district of the registry office having jurisdiction over the location of the head office) within three weeks, and the matters specified in the items of paragraph (2) of the preceding Article must be registered at the new location (excluding cases where the new location is within the jurisdictional district of the registry office having jurisdiction over the location of the head office; hereinafter the same applies in this Article) within four weeks; provided, however, that it is sufficient to register the matter set forth in item (iii) of that paragraph at the new location when a branch office is relocated to the jurisdictional district of the registry office having jurisdiction over the location of an existing branch office.