A registry office must assign a building number to each building, as provided for by Ministry of Justice Order.

If a registrar makes the first registration of a description in the heading section in relation to a right of site to a condominium unit, they must make a registration with regard to the registration record of the land on which the right of site is established, by their own authority, to the effect that the ownership, superficies or other rights registered in the registration record are categorized as a right of site.

①A person who has acquired ownership of a newly constructed building or a building other than a condominium unit for no heading registration is made must file an application for a heading registration within one month from the date of the acquisition of ownership.

②Where a building which is to exist as a condominium unit is newly constructed, if an inheritance or other general succession is made with regard to its owner, their heirs and other general successors may also file an application for a heading registration relating to the building by designating the predecessor as the heading-section owner.

①Where a single building to which a condominium unit belongs is newly constructed or where condominium units are newly constructed adjoining a building for which no heading registration is made and they constitute a single building, an application for a heading registration relating to the relevant condominium unit must be filed along with an application for a heading registration relating to the relevant newly constructed single building or other condominium units which belong to a single building to which the relevant condominium units have become to belong.

②In the case referred to in the preceding paragraph, the owner of the relevant condominium unit may file an application for a heading registration relating to the other condominium units on behalf of the owners of the other condominium units.

③Where a condominium unit is newly constructed adjoining a building for which a heading registration is made (excluding a condominium unit), an application for a heading registration relating to the condominium unit must be filed along with an application for a registration of change of the heading section relating to the building for which the heading registration is made.

④In the case referred to in the preceding paragraph, the owner of the condominium unit may file an application for a registration of change of the heading section relating to the building for which a heading registration is made, on behalf of the heading-section owner or registered holder of ownership of the building for which a heading registration is made or their heirs or other general successors.

①When two or more buildings are combined into one building, if any of the cases set forth in the following items apply, the person provided for in each respective item must, within one month from the date of the relevant combination, file applications for a heading registration of a building relating to the building resulting from the combination and for cancellation of the registration of the heading section of a building relating to the buildings that existed prior to the combination (hereinafter collectively referred to as a "registration, etc. by reason of combination"). In this case, an application for a registration of ownership must also be filed while designating the owner of the building for which no heading registration is made in the case set forth in item (ii), the heading-section owner of the building for which a heading registration is made (excluding the building for which a registration of ownership is made; hereinafter the same applies in this Article) in the case set forth in item (iv), and the owner of the building for which no heading registration is made and the heading-section owner of the building for which a heading registration is made in the case set forth in item (vi), as the registered right holder for the building resulting from the combination, when each respective item applies:

②When two or more buildings are combined into one building and if no heading registration is made for any of the buildings that existed prior to the combination, the provisions of Article 47 and of paragraphs (1) and (2) of the preceding Article apply mutatis mutandis to an application for a heading registration relating to those buildings. In this case, the phrase "A person who has acquired ownership of a newly constructed building or a building other than a condominium unit for which no heading registration is made" in Article 47, paragraph (1) is to be deemed to be replaced with "Where two or more buildings for none of which a heading registration is made are combined into one building, the person who owns the building resulting from the combination at the time of the combination, or where the building resulting from the combination is a building other than a condominium unit for no heading registration is made, the person who has acquired ownership from the person who owned the building at the time of the combination"; the phrase "Where a building which is to exist as a condominium unit is newly constructed" in Article 47, paragraph (2) and the phrase "Where a single building to which a condominium unit belongs is newly constructed or where condominium units are newly constructed adjoining a building for which no heading registration is made and they constitute a single building" in paragraph (1) of the preceding Article is to be deemed to be replaced with " Where two or more buildings for none of which a heading registration is made are combined into a single building"; the phrase "the relevant newly constructed single building or a single building to which the relevant condominium units have become to belong" in paragraph (1) of the preceding Article is to be deemed to be replaced with "a single building to which the condominium unit resulting from the combination belongs."

③In the cases set forth in paragraph (1), item (i), item (ii) or item (vi), after the two or more buildings (in the case set forth in item (vi), the three or more buildings) are combined into one building, if a person has acquired a share in the building resulting from the combination which is equivalent to the ownership of any of the buildings that existed prior to the combination for which no heading is made from the owner of the relevant building that existed prior to the combination for which there no heading registration is made, the person must file an application for a registration by reason of combination within one month from the date of the acquisition of the share.

④In the cases set forth in the items of paragraph (1), after the two or more buildings (in the case set forth in item (vi) of the same paragraph, the three or more buildings) are combined into one building, if a person has become the heading-section owner of any of the buildings that existed prior to the combination for which a heading registration is made or the registered holder of ownership of any of the buildings that existed prior to the combination for which a registration of ownership is made, the person must file an application for a registration by reason of combination within one month from the day on which a registration of correction regarding the heading-section owner or registration of ownership was made with respect to such person.

Where a registrar makes a registration, etc. by reason of combination in relation to a building for which a registration of a right is made other than a registration of ownership, etc. (meaning ownership, superficies, farming right, servitude and the right of quarrying; hereinafter the same applies in this Subsection and Article 118, paragraph (5)), and, in addition to the application information regarding the registration, etc. by reason of combination, when they are provided with the information certifying that the registered holder of the right pertaining to the registration of the right (when the registration of the right is a registration of a mortgage and mortgage securities have been issued, including the holder or endorser of the mortgage securities) has consented to have the right be extinguished for the building resulting from the combination (when a registration is made concerning a third party's right established over the relevant right, limited to the cases in which the information certifying that the third party has given consent is provided together), as provided for by Ministry of Justice Order, they must make a registration to the effect that the right has been extinguished.

①If there has been a change to any of the matters to be registered set forth in the items of Article 44, paragraph (1) (excluding item (ii) and item (vi)), the heading-section owner or registered holder of ownership (in the case of a building for which a registration of categorization as a common element or registration of categorization as a common element of a housing complex is made, the owner) must file an application for a registration of change regarding the relevant matters to be registered within one month from the day on which the relevant change occurred.

②A person who has become a heading-section owner or registered holder of ownership after there was a change to any of the matters to be registered referred to in the preceding paragraph must file an application for a registration of change regarding the relevant matters to be registered within one month from the day on which a registration of correction regarding the heading-section owner or registration of ownership was made with respect to the person.

③If a registration of categorization as a common element or registration of categorization as a common element of a housing complex has been made after there was a change to any of the matters to be registered referred to in paragraph (1), the owner (excluding the persons who must file an application for registration pursuant to the provisions of the preceding two paragraphs) must file an application for a registration of change regarding the relevant matters to be registered within one month from the day on which the registration of categorization as a common element or registration of categorization as a common element of a housing complex was made.

④If a person who has acquired the ownership of a building for a registration of categorization as a common element or registration of categorization as a common element of a housing complex is made after there was a change to any of the matters to be registered referred to in paragraph (1) (excluding the persons who must file an application for registration pursuant to the provisions of the preceding paragraph), the person must file an application for a registration of change regarding the relevant matters to be registered within one month from the date of the acquisition of ownership.

⑤Where a building is a condominium unit, a registration of change regarding any of the matters to be registered set forth in Article 44, paragraph (1), item (i) (limited to the matters pertaining to a building which is a condominium unit) or items (vii) through (ix) (with regard to the matters to be registered set forth in item (ix), limited to those specified by Ministry of Justice Order; the same applies in the following paragraph and Article 53, paragraph (2)) have the effect as a registration of change made in relation to other condominium units which belong to the same single building together with the condominium unit pertaining to the relevant registration.

⑥In the case referred to in the preceding paragraph, if a registration of change has been made with regard to any of the matters to be registered prescribed in the same paragraph, a registrar must, by their own authority, make a registration of change regarding the matters to be registered with respect to other condominium units which belong to the relevant single building.

①Where a condominium unit is newly constructed adjoining a building (excluding a condominium unit) for which a heading registration is made and they constitute a single building, and this has caused the building for which a heading registration is made to become a condominium unit, an application for a registration of change of the heading section relating to the building for which a heading registration is made must be filed along with an application for a heading registration relating to the newly constructed condominium unit.

②In the case referred to in the preceding paragraph, the heading-section owner or registered holder of ownership of the building for which a heading registration is made may file an application for a heading registration relating to the newly constructed condominium unit on behalf of the owner of the newly constructed condominium unit.

③When all of the two or more buildings (excluding condominium units) for which a heading registration is made have become condominium units mutually adjoining as a result of an extension or any other constructions, applications for registrations of change of the heading section relating to the two or more buildings for which a heading registration is made must be filed at one time.

④In the case referred to in the preceding paragraph, the heading-section owner or registered holder of ownership of any one of those two or more buildings for which a heading registration is made may file an application for registration of the heading section relating to other buildings for which a heading registration is made, on behalf of the heading-section owners or registered holders of ownership of the other buildings the heading registration is made or their heirs or other general successors.

①For a registration of correction regarding the matters to be registered set forth in Article 27, item (i), item (ii) or item (iv) (in the case of the matters referred to in item (iv), limited to those specified by Ministry of Justice Order) or the items of Article 44, paragraph (1) (excluding items (ii) and (vi)), no person other than the heading-section owner or registered holder of ownership (in the case of a building for which a registration of categorization as a common element or registration of categorization as a common element of a housing complex is made, the owner) may file an application.

②In the case of a building which is a condominium unit, the provisions of Article 51, paragraphs (5) and (6) apply mutatis mutandis to a registration of correction of the heading section regarding any of the matters to be registered as prescribed in paragraph (5) of the same Article.