What were the signs in Japan known for in the past? Were noble gasses the reason behind #1?
Noble gas
Japan was known for their use of brightly lit businesses and signage. The signs in Japan were lit with neon for a long time.
group of chemical elements tend to be chemically inert and thus form odorless, colorless, monatomic gases with low reactivity; consists of helium, neon, argon, krypton, xenon, radon, and possibly oganesson
Was the Japanese street aesthetic once illuminated by noble gasses?