Chinatown (??? Chukagai), MM21 Motomachi-Chukagai station. Yokohama's Chinatown is the largest in Japan and dates back to the Opening of Japan in 1859. These days it's unabashedly touristy, but there are plenty of Chinese grocery stores and places to buy a cheap cheongsam dress or jade knick-knacks.
 
Bay Stars Stadium
Bay Stars Stadium. Located in Naka ward. A short walk from Chinatown or Kannai station, this is probably one of the most fun places to watch a baseball game in Japan. Known as the Bay Stars Stadium, the Yokohama Baseball Team of the Central League, the Stadium itself was built on the remains of the Cricket Ballpark of the last century for the British delegation. The Bay Stars Stadium is an open roof stadium with natural grass, very rare in Japan, which prefers to man-made grass to save on costs, and the entertainment boasted throughout the games is trying hard, and doing a good job, by Japanese terms, in trying to have each game hosted at the "home ground" to be as American as possible.
Nissan Stadium located in Shin-Yokohama(???). This is one of the biggest soccer stadiums in Japan. The final match of the 2002 FIFA WORLD CUP was held here. This is a home ground of J league soccer teams, Yokohama F. Marinos and Yokohama FC.
Marine Tower. The largest onland lighthouse in the world. It is in Naka ward. Currently closed to the public until 2009 pending change of ownership and renovation.
Hikawa Maru. This passenger liner made 238 voyages across the Pacific to Seattle and Vancouver between 1930 and 1960, and served as a hospital ship during World War II.
 
Sakuragicho as seen from Sky Walk
Sky Walk. An observation platform attached to the Bay Bridge. To get there, take a bus in front of JR Sakuragicho station. If you cannot find the correct bus, ask for help from the Tourist information center located right in front of the station. However, the bus trip takes quite a while and there is nothing more to see than the view of Minato Mirai from afar.
 
Landmark Tower
Landmark Tower, MM21 Minato Mirai station. The tallest building in Japan is in the new Minato Mirai 21 district. The observation platform on the top 69th floor provides good views (admission ¥1,000). The elevators are said to be the fastest in Japan. For a classier experience, try the cocktail lounge on the 70th floor (¥1,000 cover, drinks ¥1000+ each) or eat dinner on the 68th (see below).
 
Foreigner's house in Yamate area
Sankei-en Park (???) . 35 minutes by bus from Yokohama station. Located southeast of Naka ward, this is a traditional style of park and known as Teien (lit. "set park") in Japanese. Opened in 1906, this large park (175000 sq.ft.) has many Japanese traditional buildings, 13 of which have been designated as national heritages.
Yamate (??). This is the neighbourhood where foreigners settled and still settle. You can make a pleasant walk from the Italian garden near Ishikawa-cho station to the French park near Motomachi Chukagai station. The walk will take you along some nice houses that were previously owned by rich foreigners. Nowadays, these houses can be visited freely. A nice cakeshop can be found here as well. The foreigner cemetery is also along this route and houses a small museum with some pictures of the Motomachi shopping street in the old days and some more cartoons showing how the Japanese saw foreigners.
Yamashita Park(????)* You can see the whole port of Yokohama and there's a lot of greenery. A short walk from Motomachi-chinatown station(???????), JR Ishikawa-cho station(JR???), JR Kannnai station(JR???).
Street Performance. There are many street performers in Yokohama, especially in Yamashita park and Granmall Park (Located in the middle of Landmark tower and Queens Square in Sakuragicho)every weekend. Above all, fire performance is so dynamic.
Osanbashi Pier (????). It is the main international pier at the Port of Yokohama, located in Naka Ward. The rooftop garden is open to public and is very beautiful, especially during sunset.
Kishine Park (????), Metro Kishine Koen stn. A large park 9 min away from Yokohama station, this is strictly for the locals most of the year, but very popular during cherry blossom season.
Kanagawa Budokan (????????), near Kishine Park.?Kendo (Japanese fencing), judo and archery tournaments.
Kamoike Park (????), Tsuzuki. True to the name, "Duck Lake Park" has a large lake, with ducks during the day and fireflies often visible at night in the rainy season.
Yokohama Arena(??????), Located in Shin-Yokohama. 5 minutes walk from Shin-Yokohama station. This is the biggest arena in Japan. Many famous musicians give their concerts lots of times in a year. If you want to come to those conserts, you need to buy the tickets in advance. Also, flea markets are sometimes held here. In this case, you don't need any tickets or admission. Check the official website for the detailed schedule. 
River Karasuyama(???), Located in Shin-yokohama. 10 minutes walk from Shin-Yokohama station. This is a narrow river, but cherry trees are along both side of the river. In spring, the cherry trees are in full bloom and very beautiful. Also, there are lawn and benches here, so you can relax on the benches in a good weather.
Hideyo Noguchi Memorial Park (??????), Nagahama 114-4 (15 min from Nokendai stn). Open 9 AM-5 PM daily. The laboratory of bacteriologist Hideyo Noguchi, who discovered the bacteria that causes syphilis and worked on yellow fever vaccines, and whose face adorns the 1000 yen note. The original building was destroyed in the Great Kanto Earthquake, and the present structure dates from 1997. Free.  
Moroka Kumano Shrine(??????) Located in the Okurayama area. Take Tokyu-Toyoko Line from Yokohama station, and it takes about 10minutes. Then, it takes 7 minutes walk from Okurayama station. ?045-531-0150 This is a famous shrine in Yokohama. Its god is a bird which has three legs. This bird seems like the symbol of the soccer teams of Japan. Therefore, as well as many soccer fans, even Japanese soccer players visit here and pray for the victory of their team. Of course, many other people pay the first visit of the year every year.
Shomyo Temple (???). It is a temple built by Hojo Sanetoki in 1258. It has developed into Kamakura Period. It is specified for the historic site in Japan. There is a beautiful garden. A lot of cherry blossoms bloom in spring. Moreover, precincts are illuminated at fireworks of summer and the New Year and it is very beautiful. Take the 13 Yokohama Keikyu bus from Kanazawa-bunko Station (Keihin Kyukou Main Line) get off at Shomyo-ji Temple bus stop.
Yokohama History Museum (????????)Kanagawa-ken, Yokohama-shi, Tuzuki-ku, Nakagawachuou 1-18-1 Hours:9AM-5PM Phone:045-912-7777 This museum introduces Yokohama's history from Primary period to Modern period. Next to the museum, there are excavations of Yayoi period.
Paryire Yokohama Wedding Village (??????????????????), 4-1, Chigasaki-chuo, Tsuduki-ku, Yokohama-si, tel. 045-949-0888. It is about 3 minutes from Center-Minami station. It is a hall for wedding ceremonies. It is on the street. So you can see the wedding ceremonies and bless the bride and groom with not only their family or friends but also people who happen to be passing by.When you visit there at night, you can see illuminations. You can enjoy there, whenever you visit.
Keio University is known for its campus's towering maidenhair trees, turning a lovely yellow in the fall.
Old Hiyoshidai underground trenches (???????) --- These are historical places in Keio university. There were Janapese navy command posts during the war. Naval commander ordered to attack the special attack corps (???), ground warfare in Okinawa, Yamato battleship and so on. There are many rooms. For example, battery room, operations room, power generation room, and silence room etc. You can't visit anytime. Keio university admit into there once in a month. Inquiry:045-562-0443.