The scarcity of live Japanese and the steps taken to try to correct this is well know to anyone interested in the work of interpreters in the Pacific- especially, but not confined to, Nisei interrogators.
Here is one of several accounts.
<< The 25th Infantry Division joined the Americal Division to launch an offensive on 17 December. Burden noted reluctance on the part of many soldiers to take prisoners, just as the marines before them.
Officers and enlisted men shared the attitude, as he later put it, that "the only good Jap is a dead Jap." Burden heard of one regimental commander who censured his men for bringing in prisoners, saying, "Don't bother to take prisoners, shoot the sons of bitches!"
Several times Burden heard from a front-line unit that had taken a prisoner; later he would learn that the prisoner had "died" en-route to the rear. He was concerned for practical as well as ethical reasons. American soldiers appeared to have "no appreciation for the value of the information obtainable from prisoners or documents.... As a result documents were scattered and destroyed in the search for souvenirs." Burden frequently lectured commanders and units about the intelligence value of prisoners and documents and convinced the corps commander to offer a three-day pass and a serving of ice cream as rewards for bringing in live prisoners. >>
Source: John A. Burden, "The Work of the Language Section, Including a Summary of the Work Conducted on Guadalcanal and a Tentative Plan for the Future Conduct of Japanese Language Work in the South Pacific Area"
The incentives were successful and the number of live Japanese available for interrogation increased significantly. Common-sense suggests that if allowing surrendering/surrendered Japanese to live was as dangerous as claimed, no amount of leave or ice-cream would alter allied troops attitude.
And from one of the best accounts of the Okinawa campaign;
Such surrenders were new in Japanese history. Although the percentage remained very slight relative to those killed in action, the absolute count leaped to nearly 1 ,000 — probably half of them conscripted Okinawans — on June 20 and 21.
That was the number of prisoners taken. The number shot will never be known. Some Americans believe it was many: You had no mercy for them whatever by the end of the campaign,' one would explain. 'Nine Marines in ten would shoot them. If you saw a Jap trying to surrender, you'd let him have it fast.' Other participants have disputed that. Another infantryman remembered his outfit as 'pretty damn tough; it was all hate and kill. But when we took a prisoner, he stayed alive.' The truth between the extreme claims can't be measured except to say that the killing of prisoners was widespread in at least some of the units.
Many officers condoned and even suggested it, until the multiple surrenders near the very last days. 'Your company commander would say, "Take these people [Japanese prisoners] to regimental headquarters and be back here in five minutes,"' a third infantryman would explain. 'Regimental headquarters was thirty minutes away. He was telling you to get rid of them.' We gave our prisoners every excuse to run so we could finish them,' another veteran would add. 'Nobody wanted to escort them five hundred yards through scary terrain where he could be shot. Nobody wanted to go five yards with them. For what?
Source- Okinawa 1945: The Stalingrad of the Pacific by George Feifer
Although not in the same league as the comfort women, it might of wider interest to show the set-up of the short-lived Recreation and Amusement Clubs in occupied Japan;
Link: Recreation and Amusement Association