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Play Uncharted Waters (Japan edition) Online
Daikoukai Jidai
Play Uncharted Waters online and build a Portuguese trading fleet through port commerce, careful provisioning, exploration and tactical naval battles.
Browser play

Sega Genesis / Mega Drive — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| A / B / C | S / X / Z |
| X / Y / Z | Q / A / E |
| START / MODE | Enter / V |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Uncharted Waters
Quick start
Begin in Lisbon by following the opening instructions, speaking to officials and preparing the first ship before leaving port. Hire enough sailors, then load food and water with room left for cargo. Short Iberian trade runs are safer than an immediate ocean crossing: compare market prices, buy a local speciality and sell where demand is higher. Check wind, crew condition and supplies every few days, and return before fatigue or shortages become dangerous. Invest profits in a stronger ship, navigational equipment and officers, save in port, and pursue the royal mission only after the fleet can survive a longer route.
Controls
Use the D-pad to move around town, steer at sea and move the cursor. C confirms menu choices, talks to people and opens or selects context commands; B cancels or backs out. A displays status or information, and A combined with a direction changes data pages such as fleet or supplies. Start opens the options or command menu, where saving is available in port. At sea, choose commands rather than expecting direct action controls: navigation, anchoring, battle and supply management are all menu-driven, so keep C for confirm and B for cancel consistent.
Uncharted Waters 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 · segaMD
- 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.