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