Vocabulary consisting only from characters you are able to read
僕
boku
I (used by men with close acquaintances)jlpt4
深海
šinkai
deep sea, depths of the sea, ocean depthsmix
島国
šimaguni
island country (sometimes used as a metaphor for Japan)/(P)leda1
必ず
kanarazu
always/without exception/necessarily/certainly/without fail/positively/invariably/(P)jlpt3, jlpt4, leda1
寒流
kanrjuu
cold currentmix