Changes to a common area (excluding those that do not involve significant changes to the shape or function of the common area; the same applies in paragraph (5)) are decided at a meeting at which a majority of the unit owners (excluding those who do not hold voting rights; hereinafter the same applies in this paragraph and paragraph (3)) (or, if a higher proportion is specified in the bylaws, at least that proportion), who hold a majority of the voting rights (or, if a higher proportion is specified in the bylaws, at least that proportion), are present, by resolution by at least a three-fourths majority (or, if a lower proportion (limited to a proportion exceeding one-half) is specified in the bylaws, that proportion) each of the unit owners present and of their voting rights.
In the case referred to in the preceding paragraph, if the changes to the common area will have a particular influence on the use of an exclusively-owned area, the approval of the owner of that exclusively-owned area must be obtained.
In the case of making changes to a common area by a resolution under paragraph (1), if there is a special provision in the bylaws, an act of preservation of an exclusively-owned area, or an act for the purpose of using or improving an exclusively-owned area to the extent that it does not change the nature of the exclusively-owned area, that becomes necessary in connection with the changes to the common area (referred to as an "act of preservation of an exclusively-owned area, etc." in the following paragraph and paragraph (4) of the following Article) may be decided at a meeting at which a majority of the unit owners (or, if a higher proportion is specified in the bylaws, at least that proportion), who hold a majority of the voting rights (or, if a higher proportion is specified in the bylaws, at least that proportion), are present, by resolution by at least a three-fourths majority (or, if a lower proportion (limited to a proportion exceeding one-half) is specified in the bylaws, that proportion) each of the unit owners present and of their voting rights.
第一項の決議により共用部分の変更をする場合において、規約に特別の定めがあるときは、当該共用部分の変更に伴い必要となる専有部分の保存行為又は専有部分の性質を変えない範囲内においてその利用若しくは改良を目的とする行為（次項及び次条第四項において「専有部分の保存行為等」という。）は、集会において、区分所有者の過半数（これを上回る割合を規約で定めた場合にあつては、その割合以上）の者であつて議決権の過半数（これを上回る割合を規約で定めた場合にあつては、その割合以上）を有するものが出席し、出席した区分所有者及びその議決権の各四分の三（これを下回る割合（二分の一を超える割合に限る。）を規約で定めた場合にあつては、その割合）以上の多数による決議で決することができる。
When adopting a resolution referred to in the preceding paragraph, if matters concerning the manner of the act of preservation of an exclusively-owned area, etc. or the sharing of expenses are to be specified, equity in the interests among unit owners must be ensured by taking into consideration the status of use of the exclusively-owned area subject to the resolution by its unit owner, the price paid by the unit owner for the act of preservation of an exclusively-owned area, etc. concerning that exclusively-owned area, and any other circumstances.
前項の決議をする場合において、専有部分の保存行為等の態様又は費用の分担に関する事項を定めるときは、決議の対象となる専有部分の区分所有者の利用状況、当該専有部分の保存行為等について区分所有者が支払つた対価その他の事情を考慮して、区分所有者間の利害の衡平が図られるようにしなければならない。
For the purpose of applying the provisions of paragraph (1) and paragraph (3) to changes to a common area that become necessary for removing a defect in the installation or preservation of the common area in the case where the rights or legally protected interests of others are infringed or are likely to be infringed due to the defect, or to changes to a common area that become necessary in order to improve the convenience and safety of the movement of, or the use of facilities by, elderly persons, disabled persons, etc. (meaning elderly persons, disabled persons, etc. as prescribed in Article 2, item (i) of the Act on Promotion of Smooth Transportation, etc. of Elderly Persons, Disabled Persons, etc. (Act No. 91 of 2006)) by reducing the physical burden relating to their movement or their use of facilities, the term "three-fourths" in those provisions is deemed to be replaced with "two-thirds".