The Shogunate closes off the path to Kongokaku because they are wary of Biba and the support he's managed to garner. Biba seeks an audience with the Lord of Iwado Station, though with less than pure intentions.
And without the master key, there's no 
point in going back to the Kotetsujyo.
من دون المفتاح الرئيسيّ، لن نتمكّن 
.من العودة إلى الكوتيتسوجيو
Ohne den Fürstenschlüssel brauchen wir
uns nicht auf den Kotetsujo zurückziehen.
Aunque volvamos,
sin la llave maestra no podemos irnos.
Aunque volvamos,
sin la llave maestra no podemos irnos.
Le Kôtetsujô ne sert à rien
sans sa clé maîtresse.
E senza la chiave principale,
 non ha senso tornare al Kotetsujyo.
E sem a chave-mestra, não faz sentido
voltar para a Fortaleza de Ferro!
Даже если вернёмся на «Крепость»,
без родового ключа...