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