Speaking ability

...In criminal proceedings, the idiom used to refer to the statement made by a defense attorney after the examination of evidence (Criminal Procedure Code, Article 293, Paragraph 2) is sometimes called an argument. The ability to actually make an argument in the narrow sense is called oral argument capacity, or speaking capacity. It is a rule for the smooth and speedy conduct of proceedings, and in criminal proceedings, only lawyers have oral argument capacity, while the defendant himself does not (Criminal Procedure Code, Articles 388 and 414).

*Some of the terminology explanations that refer to "presentational ability" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…なお，刑事訴訟での慣用語として，証拠調べが終わった後の意見陳述のうち，弁護人がするもの(刑事訴訟法293条2項)をとくに弁論と呼ぶこともある。　狭義の弁論を現実になしうる資格を弁論能力，または演述能力という。訴訟を円滑迅速に行うための規律であり，刑事訴訟の控訴審･上告審では弁護士だけが弁論能力を持ち，被告人本人には弁論能力がない(刑事訴訟法388条，414条)。…

※「演述能力」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報