- Acting for Two: In the English dub, Emily Neves voices Sumako Aotsuki and Jun Moritsuna, while David Wald voices Hyou and Kuin.
- All-Star Cast:
- In the 1992 OVA, we got Nozomu Sasaki, Chikao Ohtsuka, Yuri Amano, Yumi Touma, Norio Wakamoto, Kazuki Yao, Takeshi Aono, Hiromi Tsuru, Sho Hayami and Wakana Yamazaki.
- In the TV series, we got Tasuku Hatanaka, Rikiya Koyama, Mikako Komatsu, Kiyono Yasuno, Yui Makino, Daisuke Namikawa, Shin-ichiro Miki, Yūki Kaji, Risa Shimizu, Fumiko Orikasa, Ai Kayano, Yoshimasa Hosoya, Ryota Ohsaka, Ayahi Takagaki, Mamoru Miyano, Kana Hanazawa, Maaya Sakamoto, Megumi Han, Katsuyuki Konishi, Nana Mizuki, Megumi Hayashibara, Toshio Furukawa, Yuji Ueda, Mayumi Tanaka and Junichi Suwabe.
- Fan Nickname: Because of the main duo, this series is sometimes called "Calvin and Hobbes: The Anime".
- I Knew It!: The ending wherein Tora dies is already expected by some viewers of the 2015 anime, because the moment when it's revealed that Hakumen is essentially the same as Tora because he came from the latter's human form, Shakagusha, has been interpreted as a foreshadowing. And naturally, just like any Shōnen anime series, the Big Bad would die in the end.
- Out of Order: Due to the Adaptation Distillation the anime suffered, Guren makes his first, unexplained appearence attacking the Sky Mansion of the Western Youkai, then he attacks Ushio at his home when he's there with Hyo and Tora.
- Relationship Voice Actor:
- The voice actors of Ushio Aotsuki and Asako Nakamura would eventually play another two pairs in Childhood Friend Romance.
- Tora and Atsuzawa are Joe and Shadow Moon.
- Kirio, Tora, Shigure, Hyou and Giryou are Gon, Ging, Leorio, Hisoka and Chrollo.
- Tora and Giryou are Musashi and Sakuraba.
- Reiko and Hyou are Sakura and Fai.
- Reiko and Nagare are Erica and Judal.
Trivia / Ushio and Tora