Vocabulary consisting only from characters you are able to read
今上
きんじょう
(sens) the reigning emperorseiji
倍
ばい
(1)twice, double, (suf) (2)times, -fold jlpt3
元来
がんらい
originally, primarily, essentially, logically, naturallymix
羽音
はおと
(1)sound of flapping wings (of a bird)/ (2)buzz/hum (of an insect) leda1
風船
ふうせん
balloon (esp. small, toy variety)/(P)leda1