Consideration of real estate appraiser

I’ve got a qualification of real estate broker (宅地建物取引士) and started my career in this industry since a last year.  In these days, I’d like to develop a business opportunity and increase my knowledge of the industry. Therefore, I consider that I challenge to get a qualification of real estate appraiser (不動産鑑定士). It is one of the most difficult qualification in Japan but I’m interest of this area.