彼は航海で世界中を旅した

N5 彼 kare he N3 航海 koukai voyage, navigation, sailing N4 世界 sekai world N5 中 naka inside / middle N3 旅 tabi journey, travel, trip

N3 彼 hi / kare, kano, ka.no he, that, the N2 航 kou navigate, sail, cruise N4 海 kai / umi sea, ocean, mer N4 世 sei, se, sou / yo generation, world, society N4 界 kai world, boundary, monde N5 中 chuu / naka, uchi, ata.ru in, inside, middle N4 旅 ryo / tabi trip, travel, voyage

N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information