東京航海 combines 東京 (Tokyo) with 航海 (a sea voyage or navigation), creating a striking poetic expression. Rather than describing a literal boat trip, the song uses it to portray moving through Tokyo while carrying unseen burdens and trying to keep heading toward the future.
The unusual combination makes it especially memorable for learners, while 航海 is a valuable literary word that evokes exploration, uncertainty, and determination.
"Hitman" sounds like it should be about a killer, but the only target here is a person's heart. The chorus tells you to aim for the deepest part of someone's heart and fire: 心の奥底を狙って 弾を打て [aim for the depths of your heart and shoot]. The bullet is encouragement, not violence.
The verses are set in Tokyo, and they feel tired. The singer asks where the future went that was supposed to blow wide open, and what happened to childhood dreams: 子供の頃に見た夢は? [the dreams I had as a kid?]. Everyone crossing the street is quietly carrying something heavy, and everyone is wearing a mask. Then comes the kindest order in the song: 笑顔の仮面を取れ [take off your smiling mask]. You do not have to fake it anymore.
Watch for the wordplay. 東京航海 (Tōkyō kōkai, "Tokyo voyage") in verse one becomes 東京交差点 (Tōkyō kōsaten, "Tokyo intersection") in verse two, the city as a sea you sail through and then a crossing you get stuck at. The bridge admits life is scary and uncertain, and 強がらなきゃやってらんないさ [you can't get by without acting tough] is a very casual, very real way to say it. The answer? If fog hides you, aim and shoot a hole right through the cloudy sky. Pair that with the English hook "sunshine, sky high" and it is one of the most hopeful songs about burnout you will hear.