There is a wide range of hotels available in Yokohama and a number of these are close to the Pacifico Yokohama Convention Center..
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https://www.yokohamajapan.com/where-to-stay/
The Kahala Hotel & Resort Yokohama
InterContinental Yokohama Grand
Yokohama Sakuragicho Washington Hotel
Intercontinental Yokohama Pier 8
New Otani Inn Yokohama Premium
Yokohama Minatomirai Manyo Club
Toyoko Inn Yokohama Sakuragicho
Far East Village Hotel Yokohama
Hotel JAL City Kannai Yokohama
Daiwa Roynet Hotel Yokohama-Kannai
Richmond Hotel Yokohama Bashamichi
Hotel Wing International Yokohama-Kannai
Toyoko Inn Yokohama Stadium Mae No.2
Yokohama Bay Sheraton Hotel & Towers
Guest House Kanalian in Yokohama
Toyoko Inn Yokohama Nishi-guchi
R&B Hotel Shin-Yokohama Ekimae
Toyoko Inn Shin-Yokohama Ekimae Honkan
Toyoko Inn Shin-Yokohama Ekimae Shinkan
Toyoko Inn Yokohama Shinkoyasu Ekimae
Toyoko Inn Yokohama Tsurumi-eki Higashi-guchi
Sotetsu Fresa Inn Yokohama Totsuka