Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
人口 じんこう populationjlpt4, leda1
一日中 いちにちじゅう throughout the daytoki
耳にする みみにする to hear, to hear by chance, to hear by accident, to catch (the sound)suru
下水 げすい kanál, kanalizaceleda1
childhito, jlpt4