I am surprised so many Japanese survived. I would have guessed maybe 15-20 instead of over a thousand. I suspect many of them were badly wounded and unable to resist.
RE: “I am surprised so many Japanese survived.”
That’s an interesting story.
Many of the “survivors” were Korean forced laborers.
Before the invasion, there were up to 10,000 Koreans working mainly on the tunnels.
No one is sure how many were still there when the invasion began.