Vocabulary consisting only from characters you are able to read

kanji kana meaning randomReload
かわ riverjlpt5, shizen
山上 さんじょう mountain topmix
きゅう ninejlpt5, mix
ひと man, person, human being, mankindhito, jlpt5
上がる あがる to go up, to risejlpt4
大きな おおきな big, largeadj, jlpt4
上る のぼる (1)to rise, to go up, to come up, to ascend, to be raised, (2)to enter (esp. from outdoors), to come in, to go in, (3)to enter (a school), to advance to the next grade, (4)to get out (of water), t godan, jlpt3, verb, vintrans
とお 10, tenjlpt5
人口 じんこう populationjlpt4, leda1
いち onejlpt5