Some of the roughly 21 tons of “bento” boxed lunches imported between Aug. 16 and Aug. 20 from the United States by an affiliate of East Japan Railway Co. did not contain sufficient meat and fish, according to company sources.

While most of the bento were fine, a small portion over the five-day period contained less than the 20 percent meat and fish required under the Customs Law to qualify for lower tariffs, according to the sources.

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