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