E-mail: webmaster@sanritsu-kensetsu.co.jp Sanritsu Construction Co., Ltd. Headquarters〒115-0051 4-24-25Ukima, Kita-ku, TokyoTEL.03 (39 69) 4717 (main) The irreplaceable and unique star "Earth" Whether we can lose the brilliance of this life-filled star or pass it on to the next generation of new people, its whereabouts are entrusted to us. Business introduction ISO acquisition Employment information ● For inquiries