What's the weather like in Japan in late March and early April?

It's about 20 degrees on a sunny day. Wear short sleeves inside and a thin coat is just right.

Or wearing a long t alone won't be cold.

Never wear a sweater, it's so hot.

I am in Japan now. Today is 13, afternoon 1, and the temperature is 20 degrees.

I wear chiffon skirt, with stockings and boots below and a coat above.