Den amerikanske kampsportsudøver Casey Bowman studerer ninjutsu i Japan, da hans lærermester beder ham vende tilbage til New York for at udføre en vigtig opgave: Han skal beskytte den legendariske Yoroi Bitsu — en kiste med våben, der engang har tilhørt den sidste Koga ninja. De hensynsløse Yakuza snigmordere er kommet på sporet af de magtfulde våben og for at forhindre, at de falder i de forkerte hænder, må Casey bruge alt hvad han har lært - for en hver pris. Honedrolleindehaveren Scott Adkins har dyrket martial arts siden barndommen og viser her sine evner indenfor taekwondo, kickboxing, judo og jujutsu.
Udstationeret på Filippinerne, eskorterer Joe og hans gruppe en konvoj med forsyninger, undervejs bliver de angrebet af lokale rebeller - en af dem genkender Joe som en sort Ninja kæmper. Rent instinktiv forsvarer Joe sig, og hans evner inden for den hemmelige kampsport Ninjitsu bliver afsløret, ikke mindst overfor hans kammerater og officerer. Alene i sin kamp mod korruption, opdager Joe hemmeligheden omkring hans mystiske fortid - en hemmelighed der får ham i kamp med de onde Sorte Stjerne Ninja'er...
Fight everyone and trust no one: it's the code of survival practiced by martial-arts master Casey Bowman after his life of domestic bliss is shattered by a savage act of violence. Vowing revenge, the fearless American stealthily tracks the killer from Osaka to Bangkok to Rangoon with the help of a wise and crafty sensei. His only clues: a series of victims whose necks bear the distinctive mark of strangulation by barbed wire. Fighting to avenge as well as to survive, Casey must sharpen his razor-like responses and take his battle skills to the next level, even using deep meditation to fake his own death. His target: the sinister drug lord Goro, who is flooding the streets with deadly meth cooked at his remote jungle factory. To prepare for his ultimate confrontation, Casey must finally become an invisible warrior worthy of the name Ninja. But just when his prey is cornered, an unexpected twist shows Casey that his battle is only beginning: he truly can trust no one.
An American woman is stranded in Tokyo after breaking up with her boyfriend. Searching for direction in life, she trains to be a râmen chef under a tyrannical Japanese master.
A young foot soldier in the yakuza seeks revenge when his prostitute girlfriend dies after a session with a high-ranking Japanese politician with a taste for torture. He sets out on a 'kamikaze' mission to kill his bosses and the politician; along the way, he acquires the aid of a taxi driver who has recently returned to Japan after living in South America for several decades and is struggling to cope with poverty and the prejudices of native-born Japanese.
One rainy night in the Edo period, Kotono (a geisha) confronts samurais who killed her father. The samurais attack her one after another, but she fights hard against samurais with her sword. Kotono tries to chase the samurais who scramble to escape. Yet now three ninjas stand up against her. Kotono drops her sword by their wave of assaults. Can she beat them?
I oktober 2011 afskedigede det store multinationale japanske selskab, Olympus Corporation, deres administrerende direktør, briten Michael Woodford, angiveligt på grund af kulturforskelle i ledelsesstil. Japanske medier rapporterede i notitsform pligtskyldigt om endnu en udenlandsk direktør, der ikke evnede at tilpasse sig japanske forhold. Udenlandske medier derimod kunne fortælle om en ulmende ervhervsskandale. Firmaets japanske bestyrelsesmedlemmer skulle enstemmigt have afvist Woodfords ønske om at afsløre svindel i firmaet for næsten to milliarder dollar, som det mere end 90 år gamle selskab havde holdt hemmeligt i mere end to årtier!