Bicycle Navigation Marks and Bicycle Navigation Lines(自転車ナビマーク・自転車ナビライン)

The Tokyo Metropolitan Police Department has been advancing the establishment of bicycle navigation marks on the left side of roads and bicycle navigation lines at intersections to promote safe cycling.

They specify the area and direction in which a bicycle should travel.
Bicycles should travel in the direction the arrows are pointing. (Bicycles cannot travel in the opposite direction).
Bicycle navigation marks/bicycle navigation lines are not stipulated by law, and they do not signify the designation of a new traffic system. (Bicycles must follow traffic regulations as stipulated by the law or by road signs.)

Bicycles should travel in the direction in which the arrows are pointing. (Bicycles cannot travel in the opposite direction).
Bicycles traveling on roads should follow vehicle traffic signals coming up ahead.

To cyclists:
Bicycle navigation marks/bicycle navigation lines do not indicate that bicycles have the right of way or imply other legal protections for bicycles. Even if you are cycling on roads or entering intersections with bicycle navigation marks/bicycle navigation lines, you should still be very careful of cars and pedestrians.
In addition, when avoiding cars parked on the road, be sure to check whether any cars are approaching from behind you.
When entering a road or pedestrian sidewalk, be very careful of cars and pedestrians, and make sure to cycle safely.

When driving a car, be sure to pay close attention to bicycles traveling on the road, especially to bicycles on your left when you are turning left at an intersection.