Electricity
The voltage used throughout Japan is uniformly 100 volts, A.C. There are two kinds of frequencies in use—50 Hertz in eastern Japan (including Tokyo and Yokohama) and 60 Hertz in western Japan (including Nagoya, Kyoto and Osaka). Except certain types of electrical appliances, a step-down transformer is required to convert the voltage.
Weather
It's cold in December, so a coat is necessary.
The average temperature ranging between max 12°C (54°F) and min 5°C (41°F).
Currency
Major international card brands are generally accepted throughout the country. In some cases, it is useful to have cash with you as well, as you may need it. Bank ATMs have limited operating hours, but many convenience store (corner store) ATMs often operate 24 hours a day. Tipping is not required in Japan.
Emergency Phone number
110 : Police
119 : Fire / Ambulance
Sightseeing
Minato Mirai is only two stops from Yokohama Station.
The Minato Mirai 21 districts hosts an array of events throughout the year.
You'll enjoy the sights, food to suit all tastes, a variety of stores.
The center of the town is nice, but you can also take a short walk and relax in a spacious area.
Yamashita Park draw many tourists.
It has a lots of highlights such as the view to the sea, Hikawa Maru and monuments.
A museum ship Hikawa Maru is moored in Yokohama harbor.
The NYK Maritime Museum has exhibits its fascinating history.
You can tour, and have a meal in it.
Colorful night views of Minato Mirai, both indoors and out.
The scenery is amazing especially at night time.