There's no deal anymore between Yashimano and Albion (Lemurian company) anyway. Yashimano officially tried to murder the officer in command of the Lemurian company publicly, so how could any deal anymore be in effect? It's already quite strange the Yashimano army isn't requesting all Albion troops to leave immediately. The reason must be that they suspect the Albion folks might know too much of what's going to happen, so it's better to keep them around, rather than risking any leaks. At least there wasn't an attempt to silence them all for good.
But in any case, the whole thing between Yashimano and Albion has already fallen through for now. No need to worry about breaching anything when making deals with the Hasas.