{
  "version": "2026-09-launch",
  "lastReviewed": "2026-09-01",
  "primarySources": ["nintendo-hanafuda", "koikoi-rules", "koikoi-cultural-reference"],
  "cards": [
    { "id": 0, "month": 1, "monthSlug": "january", "monthName": "January", "plant": "Pine", "jp": "松", "romaji": "matsu", "class": "bright", "motif": "Crane and sun", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "Traditional January bright card." },
    { "id": 1, "month": 1, "monthSlug": "january", "monthName": "January", "plant": "Pine", "jp": "松", "romaji": "matsu", "class": "ribbon", "motif": "Poetry ribbon", "ribbonType": "poetry", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "Koi-Koi treats this as one of the red poetry ribbons." },
    { "id": 2, "month": 1, "monthSlug": "january", "monthName": "January", "plant": "Pine", "jp": "松", "romaji": "matsu", "class": "chaff", "motif": "Pine chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 3, "month": 1, "monthSlug": "january", "monthName": "January", "plant": "Pine", "jp": "松", "romaji": "matsu", "class": "chaff", "motif": "Pine chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 4, "month": 2, "monthSlug": "february", "monthName": "February", "plant": "Plum blossom", "jp": "梅", "romaji": "ume", "class": "animal", "motif": "Bush warbler", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 5, "month": 2, "monthSlug": "february", "monthName": "February", "plant": "Plum blossom", "jp": "梅", "romaji": "ume", "class": "ribbon", "motif": "Poetry ribbon", "ribbonType": "poetry", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 6, "month": 2, "monthSlug": "february", "monthName": "February", "plant": "Plum blossom", "jp": "梅", "romaji": "ume", "class": "chaff", "motif": "Plum chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 7, "month": 2, "monthSlug": "february", "monthName": "February", "plant": "Plum blossom", "jp": "梅", "romaji": "ume", "class": "chaff", "motif": "Plum chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 8, "month": 3, "monthSlug": "march", "monthName": "March", "plant": "Cherry blossom", "jp": "桜", "romaji": "sakura", "class": "bright", "motif": "Curtain", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 9, "month": 3, "monthSlug": "march", "monthName": "March", "plant": "Cherry blossom", "jp": "桜", "romaji": "sakura", "class": "ribbon", "motif": "Poetry ribbon", "ribbonType": "poetry", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 10, "month": 3, "monthSlug": "march", "monthName": "March", "plant": "Cherry blossom", "jp": "桜", "romaji": "sakura", "class": "chaff", "motif": "Cherry chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 11, "month": 3, "monthSlug": "march", "monthName": "March", "plant": "Cherry blossom", "jp": "桜", "romaji": "sakura", "class": "chaff", "motif": "Cherry chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 12, "month": 4, "monthSlug": "april", "monthName": "April", "plant": "Wisteria", "jp": "藤", "romaji": "fuji", "class": "animal", "motif": "Cuckoo", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 13, "month": 4, "monthSlug": "april", "monthName": "April", "plant": "Wisteria", "jp": "藤", "romaji": "fuji", "class": "ribbon", "motif": "Plain ribbon", "ribbonType": "plain", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 14, "month": 4, "monthSlug": "april", "monthName": "April", "plant": "Wisteria", "jp": "藤", "romaji": "fuji", "class": "chaff", "motif": "Wisteria chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 15, "month": 4, "monthSlug": "april", "monthName": "April", "plant": "Wisteria", "jp": "藤", "romaji": "fuji", "class": "chaff", "motif": "Wisteria chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 16, "month": 5, "monthSlug": "may", "monthName": "May", "plant": "Iris", "jp": "菖蒲", "romaji": "ayame", "class": "animal", "motif": "Eight-plank bridge", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 17, "month": 5, "monthSlug": "may", "monthName": "May", "plant": "Iris", "jp": "菖蒲", "romaji": "ayame", "class": "ribbon", "motif": "Plain ribbon", "ribbonType": "plain", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 18, "month": 5, "monthSlug": "may", "monthName": "May", "plant": "Iris", "jp": "菖蒲", "romaji": "ayame", "class": "chaff", "motif": "Iris chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 19, "month": 5, "monthSlug": "may", "monthName": "May", "plant": "Iris", "jp": "菖蒲", "romaji": "ayame", "class": "chaff", "motif": "Iris chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 20, "month": 6, "monthSlug": "june", "monthName": "June", "plant": "Peony", "jp": "牡丹", "romaji": "botan", "class": "animal", "motif": "Butterfly", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 21, "month": 6, "monthSlug": "june", "monthName": "June", "plant": "Peony", "jp": "牡丹", "romaji": "botan", "class": "ribbon", "motif": "Blue ribbon", "ribbonType": "blue", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 22, "month": 6, "monthSlug": "june", "monthName": "June", "plant": "Peony", "jp": "牡丹", "romaji": "botan", "class": "chaff", "motif": "Peony chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 23, "month": 6, "monthSlug": "june", "monthName": "June", "plant": "Peony", "jp": "牡丹", "romaji": "botan", "class": "chaff", "motif": "Peony chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 24, "month": 7, "monthSlug": "july", "monthName": "July", "plant": "Bush clover", "jp": "萩", "romaji": "hagi", "class": "animal", "motif": "Boar", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 25, "month": 7, "monthSlug": "july", "monthName": "July", "plant": "Bush clover", "jp": "萩", "romaji": "hagi", "class": "ribbon", "motif": "Plain ribbon", "ribbonType": "plain", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 26, "month": 7, "monthSlug": "july", "monthName": "July", "plant": "Bush clover", "jp": "萩", "romaji": "hagi", "class": "chaff", "motif": "Bush clover chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 27, "month": 7, "monthSlug": "july", "monthName": "July", "plant": "Bush clover", "jp": "萩", "romaji": "hagi", "class": "chaff", "motif": "Bush clover chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 28, "month": 8, "monthSlug": "august", "monthName": "August", "plant": "Susuki grass", "jp": "芒", "romaji": "susuki", "class": "bright", "motif": "Full moon", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "The Hanafuda moon card belongs to August in the traditional card calendar." },
    { "id": 29, "month": 8, "monthSlug": "august", "monthName": "August", "plant": "Susuki grass", "jp": "芒", "romaji": "susuki", "class": "animal", "motif": "Geese", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 30, "month": 8, "monthSlug": "august", "monthName": "August", "plant": "Susuki grass", "jp": "芒", "romaji": "susuki", "class": "chaff", "motif": "Susuki chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 31, "month": 8, "monthSlug": "august", "monthName": "August", "plant": "Susuki grass", "jp": "芒", "romaji": "susuki", "class": "chaff", "motif": "Susuki chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 32, "month": 9, "monthSlug": "september", "monthName": "September", "plant": "Chrysanthemum", "jp": "菊", "romaji": "kiku", "class": "animal", "motif": "Sake cup", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules", "kokugakuin-choyo"], "notes": "Koi-Koi models this card as an animal/object card; the cup also participates in cup yaku." },
    { "id": 33, "month": 9, "monthSlug": "september", "monthName": "September", "plant": "Chrysanthemum", "jp": "菊", "romaji": "kiku", "class": "ribbon", "motif": "Blue ribbon", "ribbonType": "blue", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 34, "month": 9, "monthSlug": "september", "monthName": "September", "plant": "Chrysanthemum", "jp": "菊", "romaji": "kiku", "class": "chaff", "motif": "Chrysanthemum chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 35, "month": 9, "monthSlug": "september", "monthName": "September", "plant": "Chrysanthemum", "jp": "菊", "romaji": "kiku", "class": "chaff", "motif": "Chrysanthemum chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 36, "month": 10, "monthSlug": "october", "monthName": "October", "plant": "Maple", "jp": "紅葉", "romaji": "momiji", "class": "animal", "motif": "Deer", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 37, "month": 10, "monthSlug": "october", "monthName": "October", "plant": "Maple", "jp": "紅葉", "romaji": "momiji", "class": "ribbon", "motif": "Blue ribbon", "ribbonType": "blue", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 38, "month": 10, "monthSlug": "october", "monthName": "October", "plant": "Maple", "jp": "紅葉", "romaji": "momiji", "class": "chaff", "motif": "Maple chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 39, "month": 10, "monthSlug": "october", "monthName": "October", "plant": "Maple", "jp": "紅葉", "romaji": "momiji", "class": "chaff", "motif": "Maple chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 40, "month": 11, "monthSlug": "november", "monthName": "November", "plant": "Willow", "jp": "柳", "romaji": "yanagi", "class": "bright", "motif": "Rain figure", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "Often identified with Ono no Michikaze in Hanafuda commentary; Japan Almanac needs a primary or reputable citation before publishing a full claim page." },
    { "id": 41, "month": 11, "monthSlug": "november", "monthName": "November", "plant": "Willow", "jp": "柳", "romaji": "yanagi", "class": "animal", "motif": "Swallow", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 42, "month": 11, "monthSlug": "november", "monthName": "November", "plant": "Willow", "jp": "柳", "romaji": "yanagi", "class": "ribbon", "motif": "Plain ribbon", "ribbonType": "plain", "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 43, "month": 11, "monthSlug": "november", "monthName": "November", "plant": "Willow", "jp": "柳", "romaji": "yanagi", "class": "chaff", "motif": "Lightning", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 44, "month": 12, "monthSlug": "december", "monthName": "December", "plant": "Paulownia", "jp": "桐", "romaji": "kiri", "class": "bright", "motif": "Phoenix", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 45, "month": 12, "monthSlug": "december", "monthName": "December", "plant": "Paulownia", "jp": "桐", "romaji": "kiri", "class": "chaff", "motif": "Paulownia chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 46, "month": 12, "monthSlug": "december", "monthName": "December", "plant": "Paulownia", "jp": "桐", "romaji": "kiri", "class": "chaff", "motif": "Paulownia chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" },
    { "id": 47, "month": 12, "monthSlug": "december", "monthName": "December", "plant": "Paulownia", "jp": "桐", "romaji": "kiri", "class": "chaff", "motif": "Paulownia chaff", "ribbonType": null, "sourceIds": ["nintendo-hanafuda", "koikoi-rules"], "notes": "" }
  ]
}