Before this incident, chief retainer INADA of Sumoto-jo Castle in Tokushima Domain (14,000 koku) had had various conflicts with Tokushima Honpan (the original domain) for some time.
徳島藩洲本城代家老稲田家（1万4千石）は、徳島本藩との様々な確執が以前よりあった。