If that's the case, the phrase doesn't represent a coherent idea at all. Instead, it's a —a trace left behind by someone searching through associations rather than directly for a single topic.
: Traditionally, a ninja is a covert agent or mercenary in Japan, known for their stealth, espionage, and martial arts skills. The term has been widely used in literature, film, and other media to denote characters with such abilities. akari minase ninja vol53 tni53 shige kawam top