Vocabulary consisting only from characters you are able to read
億
oku
(num) 100,000,000, hundred millionjlpt4
十億
džuuoku
1,000,000,000, billion (American), (obs) milliard (British)mix
万
man
(num) 10,000, ten thousand, (adv) myriads, alljlpt5
百京
hjakukjou
kvadrilionmix
兆し
kizaši
signs, omen, symptomsmix