Ch. 6 · 第３節 夜間
When passing oncoming vehicles or driving directly behind another vehicle, you must dim your headlights or switch to low beam.
[True / False · Easy]
Answer: True
Explanation
The Rules of the Road section "2. Lights (2)" clearly states that "when passing oncoming vehicles or driving directly behind another vehicle, you must dim your headlights or switch to low beam." The question matches this completely.
Source: Ch. 6 · Section (第３節 夜間) · 2 灯火(2) 対向車と行き違うときや、ほかの車の直後を通行しているときは、前照灯を減光するか、下向きに切り替えなければなりません。
See the glossary for definitions of key terms.