Wikileaks reported that the USA has been doing a lot of spying on Japan and its Prime Minister is seriously concerned about the allegations:
August 5, 2015
Japan’s Prime Minister Shinzo Abe has expressed his “serious concern” over allegations the United States spied on senior Japanese government and business officials.
Prime Minister Abe also called for an investigation into the matter during a phone call with U.S. Vice President Joe Biden, according to Japan’s top government spokesman, Yoshihide Suga.
“If it is true these Japanese individuals were targeted, it could shake the relationship of trust in our alliance and I would have to express serious concerns,” Suga quoted Abe as telling Biden.