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