My single-person GK company has to pay 186,000円 per month for shakai hoken? Am I crazy or does that seem really high?

Its a GK where I'm the only member. I enrolled my wife and I in shakai hoken in September and got the bill in October. For just September the amount was 186,000円. It's basically like I'd be buying a new iPhone every month.

Is this amount typical? Any way to reduce it?

by bigasswhitegirl