Title: United States Fleet Activities Yokosuka
Passage: United States Fleet Activities Yokosuka (横須賀海軍施設, Yokosuka kaigunshisetsu) or Commander Fleet Activities Yokosuka (司令官艦隊活動横須賀, Shirei-kan kantai katsudō Yokosuka) is a United States Navy base in Yokosuka, Japan. Its mission is to maintain and operate base facilities for the logistic, recreational, administrative support and service of the U.S. Naval Forces Japan, Seventh Fleet and other operating forces assigned in the Western Pacific. CFAY is the largest strategically important U.S. naval installation in the western Pacific. As of August 2013, it was commanded by Captain David Glenister.
Question: is there a us naval base in japan
Answer: yes