How do you play Koi-Koi online multiplayer?

Press "Play now" for online matchmaking with players worldwide, or "Private room" to create a game and share the link or room code with a friend. Both work in your browser with no download.

Can I play Hanafuda online for free?

Yes. Hanafuda Legends is free to play in your browser or on Android — ranked seasons, Daily Challenge, vs computer, and private rooms. No signup or subscription required. An iOS app is coming soon.

Koi-Koi is a traditional Japanese card game played with Hanafuda (flower cards). Two players match cards by month, capture sets called yaku, and choose to bank points or risk calling "Koi-Koi" for higher scores.

Play a card from your hand to match one on the table (same month), or add it to the table. Then draw a card and match or add it. When you form a yaku, you can stop to keep your points or call "Koi-Koi" to continue for more.

How do I play with a friend?

Click "Private Room", create a room, and choose how many rounds. Share the room code or link with your friend. They join with the code — no account required.

Yaku are scoring combinations of captured cards, such as "Five Brights", "Moon Viewing", or "Poetry Ribbons". Each yaku has a point value; the game explains them as you play.

The Hanafuda Legends blog

Guides, history and strategy for hanafuda and Koi-Koi.

JULY 19, 2026 · 7 min read · History

Why Nintendo Started as a Hanafuda Company (1889)

Long before Mario, Nintendo made flower cards. The true story of how a Kyoto craftsman founded Nintendo in 1889 to produce hanafuda — and why the game still matters.

APRIL 28, 2026 · 10 min read · Culture

The 12 Hanafuda Suits: Months, Flowers, and Meanings

All 12 Hanafuda suits explained — flowers, animals, ribbons, and how each month ties into Koi-Koi yaku. From January pine and crane to December paulownia and phoenix.

APRIL 19, 2026 · 5 min read · Rules

Koi-Koi vs Go-Stop: What's the Difference?

Koi-Koi and Go-Stop both use flower cards, but rules, player counts, and scoring differ. Compare Japan’s Hanafuda favorite with Korea’s Hwatu game.

MARCH 9, 2026 · 4 min read · Culture

Where Have I Seen Hanafuda Before? Yakuza, Summer Wars & Nintendo

Discover the pop-culture history of Hanafuda and learn how to play the Koi-Koi card game seen in Yakuza and Summer Wars.

MARCH 9, 2026 · 8 min read · Rules

How to Play Hanafuda Koi-Koi: Rules, Yaku, and Strategy

Master Hanafuda Koi-Koi with our complete guide. Learn the 12 floral suits, scoring yaku like Ino-shika-cho, the Koi-Koi decision, and winning strategies.

About this blog

Guides, history and strategy for hanafuda and Koi-Koi. Here you'll find clear explanations of the rules and every yaku, the story of the cards from 16th-century Japan to Nintendo's early days, and practical tips for winning more rounds, whether you're playing your first game or climbing the ranked ladder. Start with the beginner rules posts if you are new, then read the yaku deep-dives and the history pieces on Nintendo and the monthly suits. Every article is written for players of Hanafuda Legends, so the scoring and house-rule notes match what you see in the free browser and Android game. New posts appear regularly; use the categories below to filter guides, history and strategy.