Season 4

Yatogame-chan Kansatsu Nikki 4 Satsume (『八十亀ちゃんかんさつにっき 4さつめ』; Yatogame-chan Observation Diary Fourth Season) is the fourth season of the anime adaptation. It was announced to start production on November 23, 2021. It is expected to premiere in April 2022.

Ambassador character(s) audition!
Starting February 14, 2022, an audition will be held to cast the seiyuu for a new ambassador character designed and drawn by mankgaka Masaki Andō to appear in PR related programs for Season 4.

Audition details:
 * Held using the live distribution service "SHOWROOM": https://www.showroom-live.com/event/yatogame1
 * Audition time period: February 14, 2022 (Monday) 18:00 to February 20, 2022 (Sunday) 21:59
 * Age requirement: Only those who are 16 years of age or older can apply
 * Availability requirement: Only those who can participate in the final screening held online after the afternoon of Sunday, February 27, 2022 can apply.
 * Recording location and time requirements: Only those who can participate in the recording held in Tokyo or Aichi prefecture from April to May 2022 can apply.
 * Other requirements:
 * Only solo accounts can apply.
 * Applications via virtual streams (?) are possible.
 * If you are a minor, please be sure to apply with the consent of your guardian.
 * If you belong to a specific production, please be sure to apply with permission.
 * Only one account per person can participate in the event. If you have a group account and an individual account, you will not be able to attend the event with the other account while you are attending the event with one of the individual accounts.

There may be up to 3 winners chosen. A Grand Prix winner who will be the main ambassador character and up to 2 Semi-Grand Prix winners who may additionally appear although the role names ad other details are not decided yet.

Characters

 * Main
 * Monaka Yatogame (八十亀 最中, Yatogame Monaka) portrayed by Haruka Tomatsu
 * Kaito Jin (陣 界斗, Jin Kaito) portrayed by Mitsuhiro Ichiki
 * Mai Tadakusa (只草 舞衣, Tadakusa Mai) portrayed by Yūki Wakai
 * Yanna Sasatsu (笹津 やん菜, Sasatsu Yanna) portrayed by Mikako Komatsu


 * Supporting
 * Toshika Jin (陣 繁華, Jin Toshika) portrayed by Hisako Tōjō
 * Lala Shonai (初内 ララ, Shonai Rara; S2) portrayed by Yoshino Nanjō
 * Rin Jandara (雀田来 鈴, Jandara Rin; S2) portrayed by Eriko Matsui
 * Teppei (鉄平, Teppei; S2) portrayed by Kenji Akabane
 * Shiharu Itenmae (一天前 紫春, Itenmae Shiharu; S2) portrayed by Honoka Kuroki
 * Nanaho Koshiyasu (輿安 七帆, Koshiyasu Nanaho; S3) portrayed by Ayasa Itō
 * Serura Dobe (土辺 世瑠蘭, Dobe Serura; S3) portrayed by Maria Naganawa
 * Masahide Tsuji (辻 優秀, Tsuji Masahide; S3) portrayed by Junji Majima

Trivia

 * The ending theme song: (TBA) by Akira Ōse (逢瀬 アキラ)