Ch. 5 · 第６節 追越しなど
Even when the vehicle in front is overtaking another car, you may overtake if safety can be ensured.
[True / False · Hard]
Answer: False
Explanation
The Rules of the Road, Section "1 Prohibition of Overtaking (2) A", clearly states that "when the vehicle in front is overtaking another car (double overtaking)" is dangerous and overtaking is prohibited. It is forbidden regardless of whether safety can be ensured.
Source: Ch. 5 · Section (第６節 追越しなど) · １ 追越しの禁止（２）ア
See the glossary for definitions of key terms.