Ch. 5 · 第５節 進路変更など
When making a left turn at an intersection, you must give a signal when you reach a point 30 meters before that intersection.
[True / False · Easy]
Answer: True
Explanation
According to the signal table in the Rules of the Road, when making a left turn, you must give a signal "when you reach a point 30 meters before the point where you intend to turn left (when turning left at an intersection, 30 meters before that intersection)." Therefore, this statement is correct.
Source: Ch. 5 · Section (第５節 進路変更など) · 合図を行う場合の表「左折するとき」の項目
See the glossary for definitions of key terms.