For water supply and drainage equipment and water surroundings, go to Kishizawa Equipment Kosan Service introduction Forty-eight years since our founding, we have been working with the local community with the aim of becoming a company where things that are commonplace can be taken for granted. Business performance Our work is to meet the needs of our customers with the technological capabilities we have cultivated, only in places that are usually out of sight. 2014.11.25 We have opened the official website. Copyright © Kishizawa Equipment Kosan. All Rights Reserved.