Vocabulary consisting only from characters you are able to read
水力
suiryoku
hydraulic power, water powermix
三日
mikka
three days, the third day of the monthjlpt5, toki
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
山川
sansen; yamakawa; yamagawa
mountains and rivers; mountains and rivers; mountain riversmix
下る
kudaru
(1)to descend, to go down, to come down, (2)to be handed down (of an order, judgment, etc.), (3)to pass (of time), (4)to surrender, to capitulate, (5)(often in neg. form) to be less than, to be i godan, jlpt3, verb, vintrans