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

(持分会社の種類の変更の登記)
第九百十九条   持分会社が第六百三十八条の規定により他の種類の持分会社となったときは、同条に規定する定款の変更の効力が生じた日から二週間以内に、その本店の所在地において、種類の変更前の持分会社については解散の登記をし、種類の変更後の持分会社については設立の登記をしなければならない。

Registration of a Change of Kind of a Membership Company
Article 919   When a Membership Company becomes a Membership Company of another kind pursuant to the provisions of Article 638, the registration of dissolution must be completed with regard to the Membership Company as it was prior to the change of kind and the registration of incorporation must be completed with regard to the Membership Company as it will be after the change of kind, at the location of the head office, within two weeks from the day on which the change to the articles of incorporation prescribed in that Article became effective.