Iran's embassy in Tokyo balances certain characteristics of Iranian architecture with the advanced technology of Japan, as an expression of the expanding relations between the two countries. The main character of the building is formed by the need to reconcile two seemingly contradictory goals: accessibility for the consular section, which is open to the public, and impenetrability for the diplomatic zone. The light roof floating over the transparent entry wall, along with the sunlit courtyard, are envisioned as the welcoming and inviting aspects of the building, whereas the heavy granite-clad walls provide the required security and separation.
Source: Aga Khan Trust for Culture
