Quick answer — Hiromi Miyawaki worked on Natsume's Book of Friends Season 7 (Color Design), Natsume's Book of Friends Season 2 (Color Design), Barakamon (Color Design) and 16 more anime.
Hiromi Miyawaki worked on Natsume's Book of Friends Season 7 (Color Design), Natsume's Book of Friends Season 2 (Color Design), Barakamon (Color Design), Natsume's Book of Friends the Movie: Ephemeral Bond (Color Setting), Into the Forest of Fireflies' Light (Color Design), Natsume's Book of Friends Season 1 (Color Design), Natsume Yuujinchou: Ishi Okoshi to Ayashiki Raihousha (Color Design), Baki Hanma Season 2 (Color Design) and 11 more.