Planerat lanseringsdatum: 2026

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Battle Hanafuda is a two-player competitive game based on the traditional Japanese card game Hanafuda (Flower Cards), using the classic “Koi-Koi” rules.

Even if you’ve never played Hanafuda before, you can learn the rules naturally just by playing.

Helpful visual hints highlight cards that can complete a combination, so you can enjoy the game without memorizing every role.

You can also check the list of all winning hands anytime with a single button.

🧩 Differences from the Demo Version

The specifications of the full version are still under consideration.

If you have any ideas or requests, please feel free to share them on the community page of the demo version.

The following features are currently being considered:

• Story Mode where you aim for an ending

• Battle result recording (save data)

• Online multiplayer support

  (Note: This feature may be canceled depending on the number of active players, as stable matchmaking requires a sufficient user base.)

• Steam online features (Achievements, Leaderboards, and Cloud Saves)

🌸 Features

• Faithfully follows the official “Koi-Koi” rules used in tournaments and by Nintendo

• All cards show their month (1–12) and point value (20 / 10 / 5 / 1) in Arabic numerals

• Designed so even beginners can quickly understand the gameplay

• Strategic and thrilling matches with risk-reward “Koi-Koi” doubling mechanics

🎴 What is Hanafuda?

Hanafuda (花札) is a traditional Japanese playing card game derived from naipes, a type of card introduced from Portugal in the 1540s.

The deck consists of 12 suits representing the months from January to December, for a total of 48 cards.

Each month has four cards, divided into the following four categories:

• Bright (Hikari-fuda) — 20 points, 5 cards in total. The highest-scoring cards.

• Animal (Tane-fuda) — 10 points, 9 cards showing animals or objects.

• Ribbon (Tanzaku-fuda) — 5 points, 10 cards featuring poetic ribbons.

• Chaff (Kasu-fuda) — 1 point, 24 cards showing small background motifs.

Among the Ribbon cards:

• Those from January, February, and March are called Red Ribbons (Aka-tan) — red ribbons with writing.

• Those from June, September, and October are called Blue Ribbons (Ao-tan) — blue ribbons without text.

Hanafuda is also known as Hana-karuta or Hana-koppai (literally “flower cards”).

Interestingly, Nintendo, originally founded in 1889 as Nintendo Koppai, began as a Hanafuda card manufacturer —

a fascinating piece of history showing how deeply these traditional cards are woven into Japanese culture.

🎴 What is Koi-Koi?

Koi-Koi is a two-player duel that blends elements of poker and mahjong.

• The game begins with 8 face-up table cards and 8 cards dealt to each player.

• Players (dealer and opponent) take turns capturing cards from the table that match the same month.

• When a scoring hand is completed, you can either Finish (win) or declare “Koi-Koi” to continue the round.

• After declaring “Koi-Koi,” the round ends when a new hand is formed or when your opponent finishes first.

• Winning after declaring “Koi-Koi” doubles your score.

• However, if your opponent wins while you are in “Koi-Koi,” you lose all your points!

• In official matches, the winner is determined by the total score over 12 rounds.

• This game includes four match length options: Very Short (2 rounds), Short (4 rounds), Half (6 rounds), and Full (12 rounds).

The game offers more strategy than poker, but simpler mechanics than mahjong.

💠 List of Hands (12 Official Roles)

Press Y (or △ / S key on keyboard) during play to check the full list of hands anytime.

Cards you have already captured are highlighted in the list,

making it easy for beginners to see which cards they still need to complete a hand.

1. Gokō (Five Brights) — 10 pts

• All five Bright cards.

• Cancels Shikō and Sankō.

2. Shikō (Four Brights) — 7 or 8 pts

• Four Brights.

• 7 pts if includes Willow (November), otherwise 8 pts.

• Cancels Sankō.

3. Sankō (Three Brights) — 5 pts

• Three Brights excluding Willow (November).

4. Hanami de Ippai (Cherry Blossom Viewing with Sake) — 5 pts

• February Bright (cherry blossom) + September Animal (sake cup).

5. Tsukimi de Ippai (Moon Viewing with Sake) — 5 pts

• August Bright (moon) + September Animal (sake cup).

6. Inoshikachō (Boar-Deer-Butterfly) — 5 pts + bonus

• June, July, and October Animals.

• +1 pt for each extra Animal (max 12).

• Cancels “Animal Set”.

7. Animal Set — 1 pt + bonus

• 5 or more Animal cards.

• +1 pt for each additional. (e.g., 7 Animals = 3 pts)

8. Red & Blue Combo — 10 pts + bonus

• All three Red Ribbons + all three Blue Ribbons.

• +1 pt per extra Ribbon (max 13).

• Cancels Red, Blue, and Ribbon Set hands.

9. Red Ribbons — 5 pts + bonus

• All three Red Ribbons.

• +1 pt per extra Ribbon.

• Cancels “Ribbon Set”.

10. Blue Ribbons — 5 pts + bonus

• All three Blue Ribbons.

• +1 pt per extra Ribbon.

• Cancels “Ribbon Set”.

11. Ribbon Set — 1 pt + bonus

• 5 or more Ribbon cards.

• +1 pt per additional.

12. Plain Set — 1 pt + bonus

• 10 or more Chaff cards.

• +1 pt per additional.

• Note: The Sake Cup (September Animal) also counts as Chaff.

🎮 Controls

• A / × / Z key — Play a card / Confirm

• B / ○ / X key — Cancel / Go back

• X / □ / A key — Fast-forward animations

• Y / △ / S key — Show hand list

• Menu / Options / SPACE key — Pause the game

• Ctrl + R key — Reset Program

• Ctrl + Q key — Exit Program

✨ Recommended For

• Beginners who’ve always wanted to try Hanafuda

• Players looking for a quick, two-player battle game

• Fans of Japanese-style, strategy, and mind-game experiences

• People who enjoy tabletop games like poker or mahjong