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(定款の変更時の出資の履行)
第六百四十条   第六百三十八条第一項第三号又は第二項第二号に掲げる定款の変更をする場合において、当該定款の変更をする持分会社の社員が当該定款の変更後の合同会社に対する出資に係る払込み又は給付の全部又は一部を履行していないときは、当該定款の変更は、当該払込み及び給付が完了した日に、その効力を生ずる。

Performance of Contributions in Changing Articles of Incorporation
Article 640   In cases where changes in the articles of incorporation listed in Article 638, paragraph (1), item (iii) or paragraph (2), item (ii) of the same Article is to be effected, if members of the Membership Company that effects such changes in the articles of incorporation have not performed all or part of the payment in or delivery relating to the contributions to the Limited Liability Company after such changes in the articles of incorporation, such changes in the articles of incorporation take effect on the day when such payment in and delivery have been completed.

前条第二項の規定により合同会社となる定款の変更をしたものとみなされた場合において、社員がその出資に係る払込み又は給付の全部又は一部を履行していないときは、当該定款の変更をしたものとみなされた日から一箇月以内に、当該払込み又は給付を完了しなければならない。 ただし、当該期間内に、合名会社又は合資会社となる定款の変更をした場合は、この限りでない。

In cases where changes in the articles of incorporation to become a Limited Liability Company are deemed to have been effected pursuant to the provisions of paragraph (2) of the preceding Article, if the members have not performed all or part of the payment in or delivery relating to the members' contributions, such payment in or delivery must be completed within one month of the day when such changes in the articles of incorporation are deemed to have been effected; provided, however, that this does not apply in cases where changes in the articles of incorporation to become a General Partnership Company or Limited Partnership Company are effected within such period.