The first reviews of the Charles Tuttle edition of No-No Boy appeared in the Far East starting on May 12, 1957. You can see the clear demarcation from the second set of reviews that appeared more than two months later in the U.S. and Canada starting on July 20. The June 17 edition of Publishers Weekly announced U.S. publication as “during the last week in June.”
Far East publication
Yomiuri Japan News, May 12, 1957
Japan Times, May 24, 1957
Pacific Stars and Stripes, June 1, 1957
Mainichi Shimbun, June 2, 1957
Asahi Evening News, June 12, 1957
South China Morning Post, June 13, 1957
North American publication
Continental Times, July 19, 1957 (Canada)
North American Post, July 20, 1957 (Seattle)
Saturday Review, September 7, 1957 (New York)
Pacific Citizen, September 27, 1957 (Los Angeles)
Jubilee, September, 1957 (US)