The common theme for the discussed symbols is consideration for others.
In New Zealand we require a yellow [L] sign on cars with learner drivers (with learners drivers licenses). However I get the impression that other drivers are less considerate around a car displaying the [L] sign.
I suspect New Zealanders are generally far less considerate than Japanese. Politeness avoids a trillion sharp edges.
We also seem to be copying some of the US predilection of arsehole Ute (pickup) drivers.
The logo expressing "Limited Express" is very unspecific, imagine if buses with the Mercedes star cost extra and didn't stop at every stop.
Interesting that a lot of US road signs have words on them: https://ygraph.com/graphs/roadsigns-20120316T030941-ekrruua.... , or are obvious, whereas in Europe drivers need to learn what they mean: https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh...
For example the yield triangle, no stopping and no parking are probably unfamiliar to US drivers.
Meanwhile all Alfa Romeo Quadrofoglio drivers might be mistaken for drivers with missing limbs in Japan.
Several years back I lived in Tokyo for a couple of years. I like learning the local language. I could mostly get by with the spoken Japanese (Nihongo). Tried to learn the script but failed miserably. It's a combination of Hirgana alphabets, Katakana alphabets and to top it all 10s of thousands of Chinese Kanji. Loved my stay, very polite people. I think their vocabulary doesn't have the word impolite (polite and less polite). I would say Japanese script is one of the hardest if not hardest.
I'm a big user of the shoshinsha mark (beginner) emoji
Very interesting but the comparisons are somewhat US-centric. For example, there is an equivalent to the heart and cross in some western countries which is the sunflower lanyard.
P Plates, Japan
Pretty neat
If "drivers of private vehicles in Japan", must understand these "four symbols" then these are not "Japanese symbols that speak without words".
One thing I'd add: the "kuuki wo yomu" concept extends beyond symbols into everyday social cues too. A classic example is the "genkan" (entryway) — the slight step-up from outdoor to indoor floor level silently tells you where to remove your shoes, no sign needed. The whole house layout enforces the unspoken rule.
Train station melody chimes are another great example — they differ by station and line, so locals unconsciously recognize which station they're at by sound alone, without reading anything.
There are countless other forms of "reading the air" throughout Japanese daily life. I'd genuinely recommend visiting Japan once to experience it firsthand.
[dead]
I don't see anything particularly special about these symbols. Don't get me wrong, I like Japan but while these icons look nice, don't most symbols already speak without words?