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