In section 3.1.1b, single quotation marks are missing in the English translation's list of types of quotation marks.

"LEFT CORNER BRACKET "「", RIGHT CORNER BRACKET "」", LEFT DOUBLE QUOTATION MARK "“" and RIGHT DOUBLE QUOTATION MARK "”""
"かぎ括弧（始めかぎ括弧[「] (LEFT CORNER BRACKET)及び終わりかぎ括弧[」] (RIGHT CORNER BRACKET)）とクォーテーションマーク（左ダブルクォーテーションマーク[“] (LEFT DOUBLE QUOTATION MARK)及び右ダブルクォーテーションマーク[”] (RIGHT DOUBLE QUOTATION MARK)並びに左シングルクォーテーションマーク[‘] (LEFT SINGLE QUOTATION MARK)及び右シングルクォーテーションマーク[’] (RIGHT SINGLE QUOTATION MARK)）"

A potential version equivalent to the Japanese text could be as follows:
'LEFT CORNER BRACKET "「", RIGHT CORNER BRACKET "」", LEFT DOUBLE QUOTATION MARK "“", RIGHT DOUBLE QUOTATION MARK "”", LEFT SINGLE QUOTATION MARK "‘" and RIGHT SINGLE QUOTATION MARK "’"'