Greater Tokyo is 239 square miles (618 square km) and is home to more than 17 Million people in the day time and 12 Million at night... which means that 5 Million people commute to and from work from the outer bed town cities daily.

While the temperature in Tokyo doesn't go much over 30 degrees centigrade in summer, it does get quite humid. The beaches "officially" open from July and they can be a good place to cool down. Mountain get aways are also popular to escape the heat and humidity.

What to Wear

Casual clothes are fine for sightseeing but for business, because so much rests on appearance in Japan, one can never be too smart.

Warm clothing is advisable for winter. Although the temperature doesn't fall much below zero, the wind-chill factor can be quite high. Wet weather gear and boots wouldn't be in the way either - occasionally it snows, but this usually turns to slush.

The spring (March, April and May) is mild but you'll probably need a jacket. Even if the temperature is high people still tend to have a winter look about them.

June to early July is the rainy season. It's generally too humid for rain gear - umbrellas are best.

In the summer (July to September), despite heat and humidity the tendency is to overdress rather than strip off. Women are likely to feel very out of place in shorts. Long shorts are okay for men as long as the beach look is avoided.

Autumn days are mild, but there might be a chance of rain - rain wear advisable.

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