Is artemisweb.jp Safe?

This domain (holder: "Nazca Co., Ltd." in Japan) is hosting service for adult contents. They say about this domain, "We are free-fee hosting service. Advertising usage is OK, commercial use also OK." at google Japan registry. Original registry(Japanese) at Aug. 5th, 2009 11:21p.m.(JST+9): --- アダルト無料ホームページのレンタルサービス アルテミス 完全無料のアダルトレンタルHPスペース。国内の法人が運営し、質の高いコンテンツが充実。広告掲載や商用利用も自由。 www.artemisweb.jp/ --- At portal page of this domain:"www.www.artemisweb.jp/" seem to link to twink or DBMS sites. How to raise the cost of sites under this domain is reported to have some advertising revenue. But some of ad spaces are still "for sale" status.