The Apothecary Diaries Season 3: Premiere Date, New Cast, and Companion Film Confirmed
The Apothecary Diaries is officially coming back, and this time it's bringing more than just a new batch of episodes. A trailer, a premiere date, a new cast addition, an opening theme, and a companion theatrical film all landed together, giving fans of Maomao's court mysteries a full picture of what's coming this fall and beyond.
According to Anime News Network and ComicBook.com, Season 3 of The Apothecary Diaries (Kusuriya no Hitorigoto) will premiere October 2, 2026, at 11:00 p.m. JST — 10:00 a.m. EDT for viewers in the U.S. — airing on NTV and 29 affiliated channels as part of the "Friday Anime Night" programming block. The season will also stream on Crunchyroll, with an English dub included as part of the platform's Fall 2026 lineup.
A split-cour season, same as before
Both previous seasons of The Apothecary Diaries aired in two cours rather than as a single continuous run, and Season 3 is following that same structure. The October premiere covers the first cours, with the second cours set to premiere in April 2027. That's consistent with how Season 1 (which began in October 2023) and Season 2 (which aired across two cours in 2025) were both handled, so longtime viewers shouldn't expect anything different in terms of pacing — this is a franchise that has consistently spread its seasons across two broadcast windows rather than airing them back to back.
New cast: Reina Ueda joins as Bai Niangniang
The biggest character reveal tied to this announcement is Reina Ueda joining the cast as Bai Niangniang, described in the reveal as "a pale and mysterious nymph" — a woman with albinism who's reportedly set to play a major role in the arc Season 3 is building toward. Beyond that description, details on exactly how Bai Niangniang factors into the story haven't been laid out publicly, but her billing alongside the season's other announcements suggests she isn't a minor addition. Casting reveals for The Apothecary Diaries have tended to correlate with characters who matter to the plot at hand, so it's reasonable to expect her to be central to whatever this new arc is building toward.
The opening theme: yorushika's return
Season 3 will open with "Kumo o Nukekazashimo e Watashidake," performed by the band yorushika. yorushika has become something of a recurring presence in anime opening themes generally, and their involvement here gives the season a musical identity before a single new episode has aired. No further detail on the theme's release timing or accompanying visuals has been confirmed beyond its billing as the season's opening song.
What the new arc might be about
Here's where the reporting gets a little more specific, and also where it's worth being careful about sourcing. According to ComicBook.com specifically — a detail not independently corroborated by Anime News Network's own reporting — Season 3 opens what's being called a "disastrous new arc" centered on a locust plague that triggers widespread famine and threatens large-scale destruction. The outlet frames it as a mystery bigger in scope than the court intrigues Maomao has typically navigated inside the rear palace and the wider imperial court.
If accurate, that would mark a meaningful shift in scale for the series. The Apothecary Diaries has largely built its identity around contained mysteries — poisonings, illnesses, and political maneuvering inside relatively closed settings like the rear palace — solved through Maomao's pharmacological knowledge and sharp deduction. A famine driven by a locust plague is a much larger, more systemic kind of crisis, one that would touch an entire region rather than a single household or wing of the palace. It's worth treating this as a single-outlet report rather than a fully confirmed plot direction until ANN or Crunchyroll's own coverage lines up with it, but it does track with the season being billed as "disastrous" in scope.
A companion film is also coming
Alongside the TV season, an original anime film titled Kusuriya no Hitorigoto: Bōhi no Hihō — translated in English as The Apothecary Diaries: The Deceased Empress' Treasure — is set to open in Japan on December 11, 2026. The film's original story was written by light novel author Natsu Hyūga herself, rather than being an adaptation pulled directly from existing volumes, which suggests it's meant to stand as its own story rather than compress material fans might already know from the books or manga.
No international release plans have been confirmed for the film at this stage. Given how the franchise's TV seasons have made their way to Crunchyroll relatively smoothly, an eventual overseas release wouldn't be surprising, but nothing beyond the Japanese December 11 date has been announced.
On the production side, TOHO animation is credited on the film and season's promotional materials. A specific director and studio credit beyond that have circulated in some secondary coverage, but those details weren't confirmed at the Anime News Network or Crunchyroll level, so they're best treated as unverified for now rather than reported as fact.
The franchise's scale, for anyone catching up
For readers newer to the franchise, it's worth understanding just how large The Apothecary Diaries has become as a print property. The light novel series, written by Natsu Hyūga and illustrated by Touko Shino, has surpassed 57 million copies in circulation worldwide and has been translated into 16 languages. That's a genuinely massive footprint for a series that started, as many modern light novel franchises do, on the web.
The story originally began serialization on the user-submission platform Shōsetsuka ni Narō back in October 2011, well before it had any anime adaptation attached to it. Print light novel editions followed in August 2014, giving the story a proper publishing home and, eventually, the reach that led to a manga adaptation and the anime series fans know today. That manga adaptation, illustrated by Nekokurage, currently runs in Monthly Big Gangan, published by Square Enix. Between the web novel's origins, the light novels, the manga, and now three anime seasons plus a film, The Apothecary Diaries has built out a fairly complete multimedia presence over roughly fifteen years.
Where the story stands going into Season 3
Season 1 premiered in October 2023 and ran across two cours, establishing Maomao as a former apothecary pulled into palace intrigue after being sold into servitude, and introducing the eunuch official Jinshi as the figure whose orbit she keeps getting pulled back into. Season 2 followed in 2025, also split across two broadcast cours, continuing to deepen both the mystery-of-the-week structure and the season-spanning political threads running underneath it.
Neither Anime News Network nor ComicBook.com has confirmed exactly which light novel volume or manga chapter Season 3 will pick up from, so it's not accurate to assert a specific starting point in the source material. What is clear is that the story is moving toward something with noticeably higher stakes than what's come before, based on how the new arc has been described.
What to watch for between now and October
With just over five weeks between this announcement and the October 2 premiere, expect a fairly standard rollout: additional character reveals, a longer trailer or two, and likely confirmation of returning cast members reprising Maomao, Jinshi, and the rest of the established ensemble. Crunchyroll's Fall 2026 slate should also firm up scheduling details for the English dub as the premiere date approaches.
Bottom line
The Apothecary Diaries Season 3 has a firm premiere date, a new cast addition in Reina Ueda's Bai Niangniang, a confirmed opening theme from yorushika, and an original theatrical film releasing in Japan two months after the season begins. The locust-plague arc teased by ComicBook.com would represent the franchise's biggest swing yet in terms of scale, though it's worth waiting for broader confirmation before treating it as settled. Either way, between the split-cour TV run and the December film, this is shaping up to be the busiest stretch the franchise has had since its 2023 debut.
Expect a full trailer breakdown and cast rollout to continue building through September ahead of the October 2 premiere, with the second cours following in April 2027 and the companion film, Bōhi no Hihō, opening in Japan that December.