Suspicious seacraft. The DPRK (North Korea) especially has a habit of iilegally trespassing into Japanese waters.

tour boat

also

a forged blade, such as a sword / the wavy pattern formed in the metal on the surface of a forged blade / a sword or similar edged weapon / something sharp like a sword / someone or something powerful

bad luck, evil

playing the role of...

Alternative form of 欅

to boil / to wash / to cleanse / to soak

flame

to fry in fat or oil / to scald / to seethe / to boil