His second exam took place in February of this year, and his name did not appear on the pass list released on Thursday.
Komuro, who took the bar exam in February, lives in New York with Mako.
The names of those who passed were posted on the website of the New York State Board of Law Examiners on Thursday.
Kei Komuro, 30, the husband of former Japanese princess Mako Komuro, has failed the New York state bar exam for the second time.