Vocabulary consisting only from characters you are able to read
上る
noboru
(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
大変
taihen
awful, dreadful, terrible, very, seriousadj, jlpt5
小虫
komuši
(1)small insect, midge, (2)vermicule doubutsu
気づく
kidzuku
to notice/to recognize/to recognise/to become aware of/to perceive/to realize/to realisegodan, verb
五分五分
gobugobu
as likely as not, 50-50, even match, tiemix
分の
bunno
denominator bun no numerator (in writing common fractions), X Yth's (Y bun no X)jlpt3, math
山上
sandžou
mountain topmix