https://www.pixiv.net/users/5378
https://www.pixiv.net/stacc/yakusa
https://twitter.com/tusakabe
https://twitter.com/intent/user?user_id=21819300
https://nijie.info/members.php?id=3012
https://pawoo.net/@yakusano
https://pawoo.net/web/accounts/178061
https://sketch.pixiv.net/@yakusa
https://www.tinami.com/creator/profile/595
http://www.amazon.co.jp/日下部-ツカサ/e/B004LVTNSY/
http://c10012518.circle.ms/oc/CircleProfile.aspx
http://c10044675.circle.ms/oc/CircleProfile.aspx
https://www5d.biglobe.ne.jp/~tukasa/
http://www.geocities.jp/srw_ec/
http://www.geocities.jp/srw_ec/moon.html
http://www.geocities.jp/srw_ec/top.html
http://geocities.yahoo.co.jp/dr/view?member=srw_ec
http://p.twipple.jp/user/tusakabe
http://twitpic.com/photos/tusakabe
