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Play Otona no DS Mystery - Izumi Jiken File (Japan edition · Japanese) Online
Otona no DS Mystery - Izumi Jiken File
Play Otona no DS Mystery - Izumi Jiken File online. Investigate six mysteries as Izumi, following advice and choices that lead to different endings. See the Nintendo DS starting guide and controls.
Browser play

Nintendo DS (NDS) — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| A / B / X / Y | Z / X / A / S |
| L / R | Q / E |
| START / SELECT | Enter / V |
| Microphone | Not assigned |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Otona no DS Mystery - Izumi Jiken File
Quick start
Begin a case, read the opening and follow Izumi's first conversations. Compare what you learn with the novelist's advice before choosing a response.
Controls
Use the stylus for the basic menu and choice operations. In the special dual-character scenario, follow each screen's character and available actions before advancing.
Otona no DS Mystery - Izumi Jiken File — About this game
Izumi Kido investigates cases with advice from the novelist Masamune Kyogetsu. This DS edition combines three adapted mobile scenarios with three newly written cases, using real locations and backgrounds. Read the opening situation, follow conversations and compare the information before selecting a response. Your choices change the story and its ending, so an answer is part of the investigation rather than a disposable dialogue line. One special scenario uses both screens to control Izumi and another character at the same time. Begin with a case and establish who knows what before committing to a conclusion. The basic operations can be performed with the stylus, keeping attention on evidence, character perspectives and branching decisions.
Otona no DS Mystery - Izumi Jiken File Game manuals
Cheats
No cheats have been added for this edition.
Player verification and sources
Browser play was reviewed before this edition was published in the catalogue. The date below is the catalogue publication date, not the game’s original release date.
- Browser test and catalogue publication date
- Browsers and devices
- PC: Chrome, Edge and Firefox. Mobile: Chrome on Android and Safari on iPhone and iPad.
- Player engine and core
- EmulatorJS 4.3.0-pre · nds
- Tested by
- rwEmulator
Sources and editorial basis
rwEmulator reviews edition metadata, release information, game manuals and first-hand browser-play notes. Available manuals are linked below; the editorial policy explains how facts are checked and corrections are handled.