- How did they do it, Watanabe?
- They launched long-range land-based bombers from their carriers, B-25s.

6 seconds sound clip from the Midway (1976) movie soundboard.

You can hear this line at 00:04:41.123 in the Blu-ray version of the movie.

Quote context

[...]

- Admiral Yamamoto, please.

- He asked not to be disturbed.

- It is most urgent.

- Admiral Yamamoto? Tokyo has been bombed.

- When?

- Ten minutes ago, Admiral. Yokohama, Kawasaki and Yokosuka were also bombed.

- His Imperial Majesty is unharmed, sir. I personally phoned the palace. The Emperor is safe.

- Damage?

- Very little to Tokyo. The other cities haven't reported in yet, but it seems probable that they too were barely scratched.

- How did they do it, Watanabe?

- They launched long-range land-based bombers from their carriers, B-25s.

- They came in at treetop level, they weren't even seen until they were over the city.

- Tokyo... Bombed!

- Sir, I understand your deep concern for the Emperor's safety, but...

- You may speak freely, Commander.

- Sir, this raid is a blessing in disguise.

[...]