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