Meaning
A tall red-and-white lattice tower that narrows to a point. It is Tokyo Tower, a landmark of the Japanese capital that looks rather like the Eiffel Tower.
Use it for Tokyo trips, city views and Japanese culture: “Night view from 🗼 was unreal”. Because of the resemblance, and since there is no separate Eiffel Tower emoji, many people also use it for Paris. Pair with 🗾 or 🇫🇷 to make clear which city you mean.