Why did the japanese attack pearl harbor and why did they think it would be a decisive victory?

The reason why they attacked pearl harbor was because the united states were not happy with japan when they try to expand land so they took away its suplies and goods so they thought if they destroy pearl harbor than they can take control of there suply but they were wrong so congress declared war on japan

fearing kabuki could corrupt the nation’s morals, japanese government officials

explanation:

the national morals was so the japanese and the kabuki would stop fighting

the constitution gives congress the power to regulate commerce "among" the several states.