Kanji numbers.

Popularity (by total correct streak): 0
Popularity (by number of users): 0

Cards

ゼロ/れい 0 (zero/rei)  
一 1 (ichi)  
二 2 (ni)  
三 3 (san)  
四 4 (yon/shi)  
五 5 (go)  
六 6 (roku)  
七 7 (nana/shichi)  
八 8 (hachi)  
九 9 (kyuu/ku)  
十 10 (juu)  
十一 11 (juuichi)  
二十 20 (nijuu)  
百 100 (hyaku)  
百一 101 (hyakuichi)  
五百 500 (gohyaku)  
千 1,000 (sen)  
万 10,000 (man)  
二千 1,000 (nisen)  
七万 70,000 (nanaman)  
億 100,000,000 (oku)  
兆 1,000,000,000,000 (chou)  

Quisition is a browser-based flashcard system that repeats old cards and introduces new ones at optimal time intervals. You can create your own card packs or use those developed by others.