Homes for Americans

The U.S. Navy (over 20,000 personnel) has been operating from Yokosuka for over 70 years .... American influence can be seen (felt) in the Dobuita (Honch) shopping & entertainment district located downtown, just outside the main gate to the Navy base...

The other, noticeable, evidence of U.S. presence in Yokosuka are the high-rise housing buildings which have been built in the downtown area.

A prototypical example is Liberty Cove House .... a huge apartment building which was erected right next to JR Yokosuka Station....   

http://www.liberty-cove-house.com/

Liberty Cove's Blog also introduces temporary American residents to Japan's culture...  Some examples...

http://www.liberty-cove-house.com/blog/?p=4120

http://www.liberty-cove-house.com/blog/?p=4118

Sukajan ... Yokosuka's Bomber Jacket

One of the America things which has sort of worked its way into Yokosuka's (and Japan's) cultural fabric is the  "Sukajan"  スカジャン

You can read more about it here:

https://www.nippon.com/en/guide-to-japan/gu900245/

Yokosuka Original

Emblazoned with intricately embroidered images of fierce tigers, glowering hawks, smoldering dragons, and myriad other creatures, Japan’s iconic satin bomber jackets are eye-catching items. Known as sukajan, their distinct designs—an amalgam of Japanese and American fashion—have garnered generations of loyal fans and inspired versions by the likes of Louis Vuitton and Gucci.

Sukajan have evolved to become their own fashion genre, but their roots can be traced back to a shopping arcade in the Honchō district of Yokosuka in Kanagawa Prefecture. It was along Dobuita Street, which sits at the doorstep of a major US naval base, that “Yokosuka jumpers”—later shortened to sukajan—first appeared in the early postwar period.

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Basically, in the late-1940's, during the U.S.-led Occupation of Japan, local merchants in Yokosuka used brightly-colored cloth pieces from kimonos to sew-together jackets and shirts .... The jackets came to be called Sukajan, using the "suka" from Yokosuka and "jan", short for jumper (jacket)

Sister Cities

Yokosuka has an active international sister city program with the municipalities shown below...

City of Corpus Christi (/Texas, the United States)
Partner October 18, 1962

City of Brest (/Finistere, France)
Partner November 26, 1970

City of Fremantle (/Western Australia, Australia)
Partner April 25, 1979

City of Medway (/Kent, the U.K.)
Partner August 26, 1998

https://www.city.yokosuka.kanagawa.jp.e.rb.hp.transer.com/2210/g_info/l100050650.html