a quick post to point out this great book which aggregates TONS of Hanafuda variant
http://www.indianwolfstudios.com/hanami.html
Capture Games are the most popular Hanafuda games. Capture games involve capturing cards from a field and creating yaku (special combinations of cards) to score points.
Simplified Game for Beginners (Absolute Beginner, 2-4 players)
Matching Flowers (Beginner, 2-3 players)
Hana-Awase 1 (Beginner, 3-4 players)
Hana-Awase 2 (Beginner, 3 players)
Mushi (Beginner, 2 players)
Six Hundred (Beginner, 2-3 players)
Hachi-juu Hana (Beginner, 2-3 players)
Min-Hwatu (Intermediate, 2-3 players)
Koi-Koi (Intermediate, 2 players)
Oni Koi-Koi (Intermediate, 2 players)
Higo-Bana (Intermediate, 2-7 players)
Tensho, simplified (Intermediate, 2 players)
Go-Stop (Expert, 2-7 players)
Hachi-Hachi (Expert, 2-7 players)
Sudaoshi (Expert, 3 players)
Hachi, simplified (Expert, 2 players)
Hachi (Expert, 2 players)
Tensho (Expert, 2 players)
Sequence Games involve playing cards from your hand in sequential order with the objective of emptying your hand.
Poka (Beginner, 2 players)
Hiyoko, simplified (Beginner, 2-4 players)
Isuri, simplified (Beginner, 2-3 players)
Kage (Beginner, 2 players)
Hiyoko (Intermediate, 2-4 players)
Isuri (Intermediate, 2-3 players)
Luck Games are simple, fast-paced, gambling-oriented games. Many of the games in this section were traditionally played with Kabufuda decks.
Sutda, simplified (Beginner, 2-10 players)
Hiki-Kabu (Beginner, 2-10 players)
Oicho-Kabu (Beginner, 2-10 players)
Kyo-Kabu (Beginner, 2-10 players)
Kingo (Beginner, 2-10 players)
Sota (Intermediate, 2-6 players)
Sutda (Intermediate, 2-10 players)
Fusion Games are a collection of Western-inspired games that we reinterpreted and designed for gameplay with a Hanafuda deck. These games provide a familiar platform for Western players to become more comfortable with the Hanafuda deck.
Seasons (Beginner, 1-4 players)
Pyramid (Beginner, 1 players)
Solitaire (Intermediate, 1 players)
Eight Off (Intermediate, 1 players)
Hana-Rumi (Intermediate, 2-4 players)
Hana-Gin (Intermediate, 2-4 players)
Regarding the Koi Koi rules, there's many variant:
GAMEFLOW VARIATIONS
Minimum Points
Players need at least 3 points to be able to call “Stop”.
Otherwise they automatically call “Koi-Koi”.
First to 50
The first player to reach 50 total points wins the game.
Automatic Win
Ifaplayerisdealteither4pairsoracompletemonth,theplayer
automatically wins that round. The player receives 6 points.
Shorter Rounds
The round ends as soon as both players run out of cards in
their hand.
Four of a Kind is Not a Misdeal
If all 4 cards of a month are dealt into the field during
setup, the dealer automatically captures this set. New cards
are dealt onto the field to replace them.
Four of a Kind for the Win
If all 4 cards of a month are dealt into the field during
setup, the dealer automatically wins that round. The dealer
receives 6 points.
Storm is Wild
The Storm is considered a Wild card.
(See Wild Card instructions from Mushi p. 39)
Brewing Storm
If any August card is dealt into the field during Setup, the
Storm is considered a Wild card.
(See Wild Card instructions from Mushi p. 39)
Steal Points
Playersstartthegamewitha givennumberofpoints(e.g.50).
The winner of each round steals the points that they earned
that round from their opponent.
Tip: You can use chips or tokens to substitute points.
New Yaku Only
The active player can only call “Koi-Koi” or “Stop” after
capturing a new yaku.
Adding to an existing yaku does not give the active player
the choice to call “Koi-Koi” or “Stop”.
ROUND SCORING VARIATIONS
Winner Scores All Yaku
The winner of a round scores for all of the yaku that were
captured that round. Totaling both their own and their
opponent’s captured yaku for that round.
Rain & Fog
If a November card (Rain) is in the field, then the Flower
Viewing yaku is worth 0 points.
If a December card (Fog) is in the field, then the Moon
Viewing yaku is worth 0 points.
No Views
Moon Viewing and Flower Viewing yaku are not considered yaku.
Views with Friends
A player must capture a Bright, Ribbon, or Other yaku in
order to claim a Views yaku.
Bright
If a Bright is dealt onto the field during setup, the score for
that round is doubled.
Super Bright
If a Bright is dealt onto the fieldduring setup, then the score
for that round is doubled. If their are two Brights, then the
score for that round is tripled. If their are three Brights,
then the score for that round is quadrupled, and so on.
Koi-Koi! Multiplier
If Koi-Koi has been called once, then the score for the round
is doubled. If Koi-Koi has been called twice, then the score
for the round is tripled. If Koi-Koi has been called three
times,thenthescorefortheroundisquadrupled,andsoon.
Challenge
When a player calls “Koi-Koi” only the opponent’s score is
doubled.
Double or Nothing
When a player calls “Koi-Koi” only the player who called
“Koi-Koi” has their score doubled.
Lucky 7
If a player’s total value of captured yaku for that round is
equal to or greater than seven, then their score for that
round is doubled. If a player’s total value of captured yaku
for that round is equal to or greater than seven and any
player previously called “Koi-Koi”, then the player’s score is
quadrupled. (Another variation is to triple the score instead
of quadrupling it.)
Sake 10 or 1
Sake cup can be counted as either a Ten or a Chaff.
Sake 10 and 1
Sake cup can be counted as both a Ten and a Chaff.
Special Chaffs
The Storm, Special Paulownia, and Sake card each count as
2 Chaffs instead of 1.
Dealers Delight
If no yaku are captured in a round, then the dealer earns 6
points for that round.
Count All Yaku
Players ignore the yaku limitations. Players can score for all
of the yaku that they capture in a round.
Only One Yaku
Players can only score for their highest valued captured
yaku in a round.
http://www.indianwolfstudios.com/hanami.html
Capture Games are the most popular Hanafuda games. Capture games involve capturing cards from a field and creating yaku (special combinations of cards) to score points.
Simplified Game for Beginners (Absolute Beginner, 2-4 players)
Matching Flowers (Beginner, 2-3 players)
Hana-Awase 1 (Beginner, 3-4 players)
Hana-Awase 2 (Beginner, 3 players)
Mushi (Beginner, 2 players)
Six Hundred (Beginner, 2-3 players)
Hachi-juu Hana (Beginner, 2-3 players)
Min-Hwatu (Intermediate, 2-3 players)
Koi-Koi (Intermediate, 2 players)
Oni Koi-Koi (Intermediate, 2 players)
Higo-Bana (Intermediate, 2-7 players)
Tensho, simplified (Intermediate, 2 players)
Go-Stop (Expert, 2-7 players)
Hachi-Hachi (Expert, 2-7 players)
Sudaoshi (Expert, 3 players)
Hachi, simplified (Expert, 2 players)
Hachi (Expert, 2 players)
Tensho (Expert, 2 players)
Sequence Games involve playing cards from your hand in sequential order with the objective of emptying your hand.
Poka (Beginner, 2 players)
Hiyoko, simplified (Beginner, 2-4 players)
Isuri, simplified (Beginner, 2-3 players)
Kage (Beginner, 2 players)
Hiyoko (Intermediate, 2-4 players)
Isuri (Intermediate, 2-3 players)
Luck Games are simple, fast-paced, gambling-oriented games. Many of the games in this section were traditionally played with Kabufuda decks.
Sutda, simplified (Beginner, 2-10 players)
Hiki-Kabu (Beginner, 2-10 players)
Oicho-Kabu (Beginner, 2-10 players)
Kyo-Kabu (Beginner, 2-10 players)
Kingo (Beginner, 2-10 players)
Sota (Intermediate, 2-6 players)
Sutda (Intermediate, 2-10 players)
Fusion Games are a collection of Western-inspired games that we reinterpreted and designed for gameplay with a Hanafuda deck. These games provide a familiar platform for Western players to become more comfortable with the Hanafuda deck.
Seasons (Beginner, 1-4 players)
Pyramid (Beginner, 1 players)
Solitaire (Intermediate, 1 players)
Eight Off (Intermediate, 1 players)
Hana-Rumi (Intermediate, 2-4 players)
Hana-Gin (Intermediate, 2-4 players)
Regarding the Koi Koi rules, there's many variant:
GAMEFLOW VARIATIONS
Minimum Points
Players need at least 3 points to be able to call “Stop”.
Otherwise they automatically call “Koi-Koi”.
First to 50
The first player to reach 50 total points wins the game.
Automatic Win
Ifaplayerisdealteither4pairsoracompletemonth,theplayer
automatically wins that round. The player receives 6 points.
Shorter Rounds
The round ends as soon as both players run out of cards in
their hand.
Four of a Kind is Not a Misdeal
If all 4 cards of a month are dealt into the field during
setup, the dealer automatically captures this set. New cards
are dealt onto the field to replace them.
Four of a Kind for the Win
If all 4 cards of a month are dealt into the field during
setup, the dealer automatically wins that round. The dealer
receives 6 points.
Storm is Wild
The Storm is considered a Wild card.
(See Wild Card instructions from Mushi p. 39)
Brewing Storm
If any August card is dealt into the field during Setup, the
Storm is considered a Wild card.
(See Wild Card instructions from Mushi p. 39)
Steal Points
Playersstartthegamewitha givennumberofpoints(e.g.50).
The winner of each round steals the points that they earned
that round from their opponent.
Tip: You can use chips or tokens to substitute points.
New Yaku Only
The active player can only call “Koi-Koi” or “Stop” after
capturing a new yaku.
Adding to an existing yaku does not give the active player
the choice to call “Koi-Koi” or “Stop”.
ROUND SCORING VARIATIONS
Winner Scores All Yaku
The winner of a round scores for all of the yaku that were
captured that round. Totaling both their own and their
opponent’s captured yaku for that round.
Rain & Fog
If a November card (Rain) is in the field, then the Flower
Viewing yaku is worth 0 points.
If a December card (Fog) is in the field, then the Moon
Viewing yaku is worth 0 points.
No Views
Moon Viewing and Flower Viewing yaku are not considered yaku.
Views with Friends
A player must capture a Bright, Ribbon, or Other yaku in
order to claim a Views yaku.
Bright
If a Bright is dealt onto the field during setup, the score for
that round is doubled.
Super Bright
If a Bright is dealt onto the fieldduring setup, then the score
for that round is doubled. If their are two Brights, then the
score for that round is tripled. If their are three Brights,
then the score for that round is quadrupled, and so on.
Koi-Koi! Multiplier
If Koi-Koi has been called once, then the score for the round
is doubled. If Koi-Koi has been called twice, then the score
for the round is tripled. If Koi-Koi has been called three
times,thenthescorefortheroundisquadrupled,andsoon.
Challenge
When a player calls “Koi-Koi” only the opponent’s score is
doubled.
Double or Nothing
When a player calls “Koi-Koi” only the player who called
“Koi-Koi” has their score doubled.
Lucky 7
If a player’s total value of captured yaku for that round is
equal to or greater than seven, then their score for that
round is doubled. If a player’s total value of captured yaku
for that round is equal to or greater than seven and any
player previously called “Koi-Koi”, then the player’s score is
quadrupled. (Another variation is to triple the score instead
of quadrupling it.)
Sake 10 or 1
Sake cup can be counted as either a Ten or a Chaff.
Sake 10 and 1
Sake cup can be counted as both a Ten and a Chaff.
Special Chaffs
The Storm, Special Paulownia, and Sake card each count as
2 Chaffs instead of 1.
Dealers Delight
If no yaku are captured in a round, then the dealer earns 6
points for that round.
Count All Yaku
Players ignore the yaku limitations. Players can score for all
of the yaku that they capture in a round.
Only One Yaku
Players can only score for their highest valued captured
yaku in a round.
