Supplementary Provisions, Article 17Transitional Measures Concerning the Period for Constructive Consent of the Opposing Party to Withdrawal of an Action, etc.
第十七条（訴えの取下げ等につき相手方の同意を擬制するための期間に関する経過措置）
In the following cases, with regard to the period for deeming that the adverse party has consented to the withdrawal of an action or the withdrawal of an objection to a final judgment in an action on a bill or note or an action on a check (referred to below in this Article as "withdrawal of an action, etc."), the provisions then in force continue to govern, notwithstanding the provisions of Article 261, paragraph (5) of the New Act (including as applied mutatis mutandis under the New Act):
次に掲げる場合には、訴えの取下げ又は手形訴訟若しくは小切手訴訟の終局判決に対する異議の取下げ（以下この条において「訴えの取下げ等」という。）に相手方が同意したものとみなすための期間については、新法第二百六十一条第五項（新法において準用する場合を含む。）の規定にかかわらず、なお従前の例による。
if the withdrawal of an action, etc. is made in writing and that document is served on the adverse party before the New Act comes into effect;
if the withdrawal of an action, etc. is made orally on a date for oral arguments, before the New Act comes into effect, on which the adverse party appeared;
if the withdrawal of an action, etc. is made orally on a date for oral arguments (excluding the case where the adverse party appeared on that date) and a transcript of the record for the court date is served on the adverse party before the New Act comes into effect.