what does the yellow and green arrow mean
The shoshinsha mark (初心者 マーク) or Wakaba mark (若葉 マーク), introduced in 1972, is a green and yellow V-shaped symbol that new Japanese drivers must display on their cars for one year. A driver must display this mark on the front and back of the car for one year after they obtain a standard driver's license. This obligation is only for a standard license, not for motorcycles, large vehicles, special cars, etc. Drivers who consider themselves beginners may continue to display the sign, even after the period of a year.