法令翻訳 http://www.japaneselawtranslat...amp;page=5

(無限責任社員となることを許された未成年者の行為能力)
第五百八十四条   持分会社の無限責任社員となることを許された未成年者は、社員の資格に基づく行為に関しては、行為能力者とみなす。

Capacity to Act of Minors Permitted to Become Members with Unlimited Liability
Article 584   A minor who is permitted to become a member with unlimited liability of a Membership Company is deemed to be a person with capacity to act regarding any act committed in the minor's capacity as a member.