When there is enough space between you and a specified small motorized bicycle (electric kick scooter) travelling in the same direction, you do not have to reduce your speed.
同じ方向に進んでいる特定小型原動機付自転車（電動キックボードなど）との間に十分な間隔があるときは、速度を落とす必要はない。
This statement is TRUE
Explanation
True. A speed matched to the gap is required only where the gap is not enough. Even when it is, allow for the other rider wobbling.
Original text
当該車両と当該特定小型原動機付自転車等との間に十分な間隔がないときは、当該特定小型原動機付自転車等との間隔に応じた安全な速度で進行しなければならない。
Source: Road Traffic Act — 道路交通法 第十八条（左側寄り通行等） · Act No.105 of 1960
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