Supplementary Provisions, Article 18Transitional Measures Concerning Constructive Withdrawal of an Action, etc.
第十八条（訴えの取下げ等の擬制に関する経過措置）
If, on a date for oral arguments before the New Act comes into effect, both parties failed to appear, or left the courtroom without presenting an oral argument, the provisions then in force continue to govern the period for deeming that an action, appeal or final appeal has been withdrawn, or that an objection to a final judgment in an action on a bill or note or an action on a check has been withdrawn, notwithstanding the first sentence of Article 263 of the New Act (including as applied mutatis mutandis under the New Act).
新法の施行前の口頭弁論の期日に当事者双方が出頭せず、又は弁論をしないで退廷した場合には、訴え、控訴若しくは上告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があったものとみなすための期間については、新法第二百六十三条前段（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。
The second sentence of Article 263 of the New Act (including as applied mutatis mutandis under the New Act) does not apply to a party's failure to appear, or leaving the courtroom without presenting an oral argument, on a date for oral arguments before the New Act comes into effect.
新法第二百六十三条後段（新法において準用する場合を含む。）の規定は、新法の施行前の口頭弁論の期日における当事者の不出頭又は弁論をしないでした退廷については、適用しない。