On a road where a sign designates a maximum speed, you must not travel below that designated speed.

Explanation

False. A designated maximum speed is a ceiling you must not exceed; travelling below it is not in itself an offence. A floor is set only by the separate minimum-speed rule.

Guides that explain this

• Stopping Distance in Japan: Reaction Distance + Braking Distance
• Overtaking and Lane Rules in Japan: Where It Is Banned, and How

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