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