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