However, since the restoration work by traditional techniques infringed on the Building Standards or Fire Prevention Act, there were problems in that entry into gates and turrets was restricted or castle towers could not be constructed due regulations on building height for disaster prevention, with modern techniques being partly introduced or reconstruction plans given up as in the case of Sanju Yagura (three tiered turret) of Sendai-jo Castle.
しかし、伝統的な技法での復元工事では、建築基準法や消防法等に抵触するため、門や櫓は人の立ち入りが制限されたり、天守に至っては高さや防災上の規制により建築自体ができないなどのジレンマもあったため、近代的な技法を一部導入したり、仙台城の三重櫓のように再建計画自体が断念される事例もある。