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“Looking for Sunday Conan 1154 spoilers & theories?”
The previous arc revolved around a leaked photo—and ended with a crucial RUM appearance.
File 1154 launches a brand-new mini-arc.
This review follows the story as it stood when File 1154 appeared in December 2025, before the April 10, 2026 Japanese release of Fallen Angel of the Highway. Weekly Shonen Sunday had announced the title. File 1154 spotlights Chihaya Hagiwara and Jugo Yokomizo; a connection to the film is a possible reading of that promotion, not confirmation of either character’s role in the movie.
Detective Conan File 1154 “A Ring and A Spring” – Spoilers & Analysis
Spoiler warning.
Detective Conan File 1154 “A Ring and A Spring” – Spoilers
The story opens at a hot-spring ryokan in Hakone. Exhausted from work, Jugo Yokomizo (Kanagawa Prefectural Police) slips away for a solo soak.
The inn includes a mixed-gender bath, where a lively group of women is chatting—among them Chihaya Hagiwara (Kanagawa Traffic Division) and her friend Shinobu.
Because Yokomizo secretly has feelings for Chihaya, the “chance reunion” leaves him flustered. Also staying at the inn are Kogoro Mouri, Ran, and Conan—in other words, the whole cast you’d expect when a case is about to break.
Other bathers: a former girls’ table-tennis quartet
Sharing the mixed bath is a four-woman group of former high-school table-tennis teammates who still keep in touch:
- Former ace: Reiko Shibukawa
- Former manager: Kurumi Nishiei — recently married to national-team player Katsuto
- Former captain: Tamie Ichiki
- Former vice-captain: Sumika Jujo
Complication: all three of the others once confessed to Katsuto—and were rejected—so the mood is… delicate.
After the bath, a “ring” goes missing
Once they leave the bath, Kurumi realizes her cherished ring is gone. The four split up to search:
- Kurumi returns to her room
- Shibukawa checks the table-tennis hall
- Jujo searches the tub and washing area
- Ichiki checks the restroom
Chihaya Hagiwara’s memory of senior-year summer
Watching the frantic search, Chihaya and Shinobu recall their own senior-summer memory: at a fireworks festival, Chihaya spent 30 minutes trying to win a “first-prize ring” at a shooting stall.
Then Jinpei Matsuda and Kenji Hagiwara showed up. Matsuda grabbed the toy rifle: “Fine, I’ll win that ring for you—but if I do, you’re my bride!” (unofficial translation) He misses; Shinobu takes a shot and nails it.
“Then you’re my bride!” (unofficial translation) she teases, and Chihaya blushes. It’s a tender flashback that deepens the Chihaya–Matsuda backstory.
While they search for the ring, an unexpected crime
As the hunt continues, a drenched Tamie Ichiki knocks on Kurumi’s door right in front of Conan’s group.
They open it to find Kurumi Nishiei inside—her throat cut, dead. Evidence shows the perpetrator entered the room wearing slippers. What began as a missing-ring caper now turns into a full-blown murder case.
Detective Conan File 1154 “A Ring and A Spring” – Review & Theories
At the chapter’s release, its timing suggested a possible connection to the promotion for the 2026 film. File 1154 functions as a prologue, so the focus here is on impressions and setup rather than a full whodunit.
1154 Review & Theory ① – Jinpei Matsuda’s instant classic line
The moment that hits hardest is Matsuda’s half-proposal at the festival shooting booth:
“All right then… I’ll win that ring for you! But if I do, Chihaya—you’re gonna be my bride.” (unofficial translation)
It’s blunt, funny, and a little bittersweet—quintessential Matsuda. And of course, he misses, which only underscores his endearing rough edges.
1154 Review & Theory ② – A possible link to “Fallen Angel of the Highway”
At the time File 1154 appeared, the accompanying film promotion showed Kenji Hagiwara and Jinpei Matsuda in the teaser for “Fallen Angel of the Highway.” Their presence in that image does not establish their roles in the film.
File 1154’s high-school flashback of Chihaya, Matsuda, and Kenji brings their relationships and emotions into focus. It could be read as a refresher ahead of the film, but the scene does not establish a planned movie tie-in.
The ring-shooting episode could give that earlier audience emotional context before the film. Further film-related scenes seemed possible at File 1154’s release; that expectation does not establish what later chapters or the finished movie delivered.
1154 Review & Theory ③ – The case is still in its opening phase—the culprit silhouette is unclear
As an introduction, File 1154 lays out victims, relationships, and the missing ring, but it’s too early to narrow suspects decisively. The real unraveling should begin next chapter.
The hook will be how Jugo Yokomizo and Chihaya’s character beats intersect with the former table-tennis club’s tangled dynamics.
- Relationship map presented cleanly
- Ring-centric foreshadowing placed for later payoff
- Emotional texture for Chihaya, Matsuda, and Kenji, with a possible connection to the film’s promotion
As a case opener, it balances the missing-ring puzzle with Chihaya’s memories. A connection to the film remained a possible interpretation at this point.
Further reading (contains spoilers): Chihaya Hagiwara and Jugo Yokomizo's relationship and Jinpei Matsuda's death and relationships.
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