Open Questions — What We Still Can't Confirm About TSUMIMI TIME

Every guide site has gaps. Most hide them by writing around them, which is how a wrong answer becomes a permanent one: someone guesses, someone copies, and two years later the guess is the only version indexed. This page takes the opposite approach — it lists what we could not confirm, what we actually tried, and how confident we are in the best answer we have.

Source note: Everything below was attempted on Version 1.0.1 between 23 and 24 October 2026. A Confirmed rating means we reproduced it more than once. Observed means we saw it but could not isolate the cause. Unverified means the official text does not settle it and our attempts failed. Nothing here is upgraded by repetition in other guides.

The seven gaps at a glance

If you only need one row, take it from here. The sections below each gap carry the method and the reasoning; this table carries the answer and how much weight it deserves.

Two rows are Unverified and five are Observed. Not one is Confirmed — that is the honest state of a game that has been out for two days, and it is the reason this page exists rather than seven confident paragraphs.

How to read the confidence ratings

The three labels are not decoration. Each one implies a different amount of work behind it, and a different amount of trust you should extend.

The gap between Observed and Confirmed is where most guide sites quietly cheat: a single sighting gets written up as a mechanic, because "we saw it once" reads as weaker than "this is how it works". We keep the label because the difference is real — the Day 7 cause below was Observed for a full day before a second save turned it into something we would call reliable.

1. Which deduction answer maps to which ending

What we tried. Nine endings means nine branch outcomes, and the natural assumption is that each final blank has one answer that routes to one ending. We tested three saves through the final chapter with deliberately different blank combinations, and cross-referenced the resulting achievement against Steam's ending label.

Best current answer. The final deduction result decides the ending, and a single wrong blank routes the run to End 8 (INFERENCE FAILED). Beyond that, the mapping is not one-to-one: some combinations produced the same ending, which suggests the result is scored rather than selected.

Confidence. Observed. Three saves is not enough to publish a full mapping table, and we would rather show the nine official labels than a nine-row table we invented.

2. Whether End 5 (EXTRA) counts as a main-line ending

What we tried. The achievement is named EXTRA, its label is End 5, and its description reads like a joke credit — "Tsumimi Time Part 1 -End-, To Be Continued in Space War Arc?". We reached it once and compared the post-ending state against the other branches.

Best current answer. It behaves like an ending (it terminates the run and records an achievement) but sits outside the arc the other eight describe. It is 2.7% of players, the second rarest ending.

Confidence. Unverified. Nothing in the official text says whether it is main-line, and one playthrough cannot distinguish "extra branch" from "poorly written final branch".

3. How many investigation files exist in total

What we tried. We counted every file in our archive at the end of a thorough run, then compared it against the All Survey File Acquired achievement, which sits at 0.4% — the rarest achievement in the game, rarer than any ending.

Best current answer. The count is higher than a single thorough run produces, because the achievement is rarer than finishing any branch. We do not have a total we can defend.

Confidence. Unverified. This is why no page on this site puts a number in its title for files. A page that says "all 42 files" and is wrong is worse than a page that says "every file".

4. Whether wish-list contents are route-dependent

What we tried. We compared wish lists across three saves at the same in-game day, then compared notes against player reports of the stun gun not appearing.

Best current answer. Contents appear to vary, at least partly. We could not produce a deterministic rule, and we could not reproduce a save where the stun gun was entirely absent.

Confidence. Observed for variation, Unverified for the specific missing-stun-gun report. The gift calculator therefore answers timing questions only — it will not tell you whether an item will show up.

5. What triggers the Day 7 floor check, exactly

What we tried. The stun gun before the Day 6 stream is documented and reproduces reliably. We then tried skipping the Day 6 stream with the gift delivered, to see whether the option survives.

Best current answer. The gift is the confirmed precondition. Skipping the stream may be a second, independent precondition — we saw the option missing after a skipped stream, but the same save also had an ambiguous delivery.

Confidence. Observed. Documented in the Day 7 troubleshooting page as a second possible cause rather than a rule.

6. Whether Mega Chat tone is scored continuously or by threshold

What we tried. We sent the same tone at different intensities across chapters and recorded whether the branch moved. The game gives visible feedback on her reaction but no numeric state.

Best current answer. Tone matters more than price — a cheap, well-matched message can outperform an expensive, badly matched one. Whether that is a continuous score or a set of thresholds, we cannot tell from outside.

Confidence. Observed. The practical advice on the streamer guidance page is written to be correct under either model.

7. Whether the village's belief system is supernatural in-fiction

What we tried. We read every document we could collect across two runs and compared the language used about the ritual, the disappearances and the village's history.

Best current answer. The game is deliberately ambiguous, and it keeps the ambiguity consistent across branches rather than resolving it in one. Both readings — supernatural practice and human delusion — are supported by text the game shows you.

Confidence. Observed for the ambiguity, Unverified for either resolution. This is interpretation, not mechanics, and the lore page presents both readings without choosing.

What would actually close these gaps

"Let us know if you know more" is not a request anyone can act on. The table below is the version that is: for each gap, the specific evidence that would move it a level, and what we would do with it.

Row 6 is the tell. Some gaps are open because the evidence is expensive to gather, and some are open because the game never exposes the answer. Sorting them into those two groups is more useful than a single list, because only the first group is worth anyone's time.

Why this page is not a disclaimer

A generic "content may not be accurate" footer tells you nothing and protects nobody. A list of seven specific gaps, with the method used to attack each and a rating for the answer, tells you exactly how much weight to put on what you just read — which is the only thing a reader can actually use.

If you can close one of these gaps, the report is welcome. What makes a report actionable here is the same three things every time: which day, which save state, and what you observed rather than what you concluded. The community section explains where those reports get read.

Related

• Troubleshooting index — the five symptoms we can fix
• All 9 endings — official labels and live rates
• Achievement rates — the sixteen rows these questions are built on
• 15-day walkthrough — the day structure referenced throughout