Even though Gennosuke and Oboro are from rival ninja villages, they are secretly in love. At an annual conference with the Lord, it is dictated that a competition--a fight to the death--will take place between the five best shinobi from each village. Gennosuke and Oboro's love is made even more impossible when they each got picked as the leader of the five to represent their respective villages.
You can now watch Shinobi: Heart Under Blade online on the following streaming providers in the United States.
| Writing | Fûtarô Yamada | Author |
| Writing | Kenya Hirata | Author |
| Directing | Ten Shimoyama | Director |
| Sound | Taro Iwashiro | Original Music Composer |
| Art | Toshihiro Isomi | Production Design |
| Camera | Masasai Chikamori | Director of Photography |
| Production | Nozomu Enoki | Producer |
| Editing | Isao Kawase | Editor |
