Chimamire no Kyuujitsu (血まみれの休日)
Bourei no Sasayaki (亡霊のささやき)
Kyoufu!! Noroi no Origami (恐怖！！ 呪いの折紙)
Raimei no Kieta Yoru (雷鳴の消えた夜)
A number of works by Kosakabe were published in the 1960’s by Wakagi Shobou (若木書房) under the Wakagi Himawari Book (若木ひまわりブック) series for girls. As far as I know, though, none are horror.
- 441. Kiri no Yakata* (霧の館)
released under the name "こさかべようこ"
- 452. Koucha o Ikaga?* (紅茶をいかが？)
- 460. Okashi na Okashi na Aniki-tachi* (おかしなおかしな兄貴たち)
- 469. Aoi Lemon no . . .* (青いレモンの…)
- 473. Origami o Otte* (折り紙を折って)
Kosakabe may also have done the artwork for Manga Kagerou Nikki (マンガ蜻蛉日記), written by Mamoru Sasaki (佐々木守) and published by Heibonsha (平凡社). The name listed on the cover is "小坂部陽子."