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.

If you hear a Japanese person yell "K.Y.! K.Y.!" you'd better blush, and not because they're referring to a fun-times lubricant. It stands for "kūki yomenai", literally "cannot read the atmosphere". Kind of like "Hey, read the room, asshole!"