| Over the centuries, while ninjutsu was being practiced in secrecy, no one knew anything about the art except the ninjas themselves. |
| The Law of Conservation of Ninjutsu was working in the main characters' favor, but even so, it was hard going. |
| The same one that made me learn ninjutsu in the real world made me learn to shoot a gun too. |
| They look the same, but the heart is different, just as ninjutsu and horse photography look quite different, but at that one point are very similar. |
| Sort of like a SCIENCE application of the Law of Conservation of Ninjutsu? |
| I thought, however, it would be a good idea to educate your readers about the real nature of ninjutsu. |
