Here is the full list of all 35 Koi-Koi Japan Hanafuda playing cards achievements.
Win 100 times.
Complete "Light Four" Yaku 10 times.
Collect each variety of postcard.
Complete "Light Three" Yaku 10 times.
Defeat opponents from all areas in Collection Mode.
Complete "Boar, Deer, Butterfly" Yaku 5 times.
Complete "Light Five" Yaku.
Complete all Yaku.
Complete "Red and Blue Ribbons" Yaku.
Win 10 times.
Get 10 successive wins.
Complete "Light Four" Yaku.
Get 5 successive wins.
Complete "Boar, Deer, Butterfly" Yaku.
Form 5 Yaku or more in 1 round.
Earn 10 points or more with 1 Stop.
Earn 20 points or more with 1 Stop.
Complete "Light Three" Yaku.
Defeat opponent for the first time.
Call Stop after your opponent calls Koi Koi.
Complete "Blue Ribbon" Yaku.
Complete "Moon and Cup" Yaku.
Complete "Rain Light Four" Yaku.
Call Koi Koi, form a new Yaku, and call Stop.
Complete "Red Ribbon" Yaku.
Complete "Cherry Blossom and Cup" Yaku.
Form 3 Yaku or more in 1 round.
Quit Tutorial Mode.
Win 500 times.
Complete "Light Five" Yaku 10 times.
[Multiplayer]Quit Tutorial Mode.
[Multiplayer]Defeat opponent for the first time.
[Multiplayer]Win 10 times.
[Multiplayer]Win 100 times.
[Multiplayer]Earn 20 points or more with 1 Stop.