Aster ageratoides var. intermedius (Soejima) Mot.Ito & Soejima (original description)
Dendranthema cuneifolia (Kitam.) H.Koyama accepted as Dendranthema ×cuneifolium (Kitam.) H.Koyama (original description)
Dendranthema miyatojimensis (Kitam.) H.Koyama accepted as Chrysanthemum miyatojimense Kitam. (original description)
Eupatorium makinoi T.Kawahara & Yahara (original description)
Parasenecio auriculatus (DC.) H.Koyama (original description)
Parasenecio shirouma-montanus (Shizuo Ito & H.Koyama) H.Koyama (original description)
Parasenecio yakusimensis (Masam.) H.Koyama (original description)
Saussurea nipponica var. yakusimensis (Masam.) H.Koyama accepted as Saussurea nipponica subsp. savatieri var. yakushimensis (Masam.) H.Koyama (original description)