You’re walking along a path and another person approaches from the opposite direction.
Do you tilt your head to signify which direction around them you intend to go? Is that head tilt understood by others?
Should we start pointing also?
Install hand blinkers?
The left vs right thing in Japan depends on the city. Particularly for escalators. Some places will have signs that say to stand on left while others say to stand on right. Others also say not to walk on the escalator, but people always ignore that.