The significant reason why the reconstruction work has been unable to begin is that this project is really no ordinary undertaking...
Since 1869, the last major expansion of the Soul Summoning Society ended in 1970, and both its architectural scale and complexity are quite considerable.
Setting aside the highly controversial question of the purpose of reconstruction, the costs are exceedingly difficult to bear.
The Island Country authorities are still troubled by the accident at Haneda International Airport, and even if they could divert the victim assistance funds, resuming normal operations at the airport is of the utmost urgency; with the added losses during the repair process, there's just no extra funding for the Soul Summoning Society's reconstruction.