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