Well this is my favorite wallet and I think it's lucky. BUT lately, I don't bring it as often as I used to -- maybe my subconcious mind doesn't want to abuse its luckiness lol.. I always bring the coin purse instead coz it's not bulky.
Inside my wallet are lots of cards...
point cards from different malls and boutiques
Omamori (Japanese: お守り, o-mamori) - a Japanese amulets or goodluck charm
Alien registration (外国人登録, gaikokujin tōroku)
No money but coins