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